Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / xsp / System / Web / Extensions / ui / webcontrols / DataPager.cs / 2 / DataPager.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.ComponentModel;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics.CodeAnalysis;
using System.Drawing;
using System.Drawing.Design;
using System.Globalization;
using System.Text;
using System.Web;
using System.Web.Resources;
using System.Web.UI;
namespace System.Web.UI.WebControls {
[
ParseChildren(true),
PersistChildren(false),
Themeable(true),
SupportsEventValidation,
Designer("System.Web.UI.Design.WebControls.DataPagerDesigner, " + AssemblyRef.SystemWebExtensionsDesign),
ToolboxBitmap(typeof(DataPager), "DataPager.ico"),
ToolboxItemFilterAttribute(AssemblyRef.SystemWebExtensions, ToolboxItemFilterType.Require),
]
[AspNetHostingPermission(System.Security.Permissions.SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(System.Security.Permissions.SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
public class DataPager : Control, IAttributeAccessor, INamingContainer, ICompositeControlDesignerAccessor {
private readonly new IPage _page;
private DataPagerFieldCollection _fields;
private IPageableItemContainer _pageableItemContainer;
private int _startRowIndex = 0;
private int _maximumRows = 10;
private int _totalRowCount;
private bool _setPageProperties = false;
private bool _initialized = false;
private AttributeCollection _attributes;
private bool _creatingPagerFields;
private bool _queryStringHandled;
private string _queryStringNavigateUrl;
public DataPager() {
}
internal DataPager(IPage page) {
_page = page;
}
///
/// Gets the collection of attribute name/value pairs expressed on the list item
/// control but not supported by the control's strongly typed properties.
///
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public AttributeCollection Attributes {
get {
if (_attributes == null)
_attributes = new AttributeCollection(new StateBag(true));
return _attributes;
}
}
///
/// Ensure that the child controls have been created before returning the controls collection
///
public override ControlCollection Controls {
get {
EnsureChildControls();
return base.Controls;
}
}
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.DataPagerFieldTypeEditor, " + AssemblyRef.SystemWebExtensionsDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
Category("Default"),
ResourceDescription("DataPager_Fields"),
]
public virtual DataPagerFieldCollection Fields {
get {
if (_fields == null) {
_fields = new DataPagerFieldCollection(this);
if (IsTrackingViewState) {
((IStateManager)_fields).TrackViewState();
}
_fields.FieldsChanged += new EventHandler(OnFieldsChanged);
}
return _fields;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int MaximumRows {
get {
return _maximumRows;
}
}
[
DefaultValue(""),
IDReferenceProperty(typeof(IPageableItemContainer)),
WebCategory("Paging"),
ResourceDescription("DataPager_PagedControlID"),
SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId="ID"),
Themeable(false),
]
public virtual string PagedControlID {
get {
object o = ViewState["PagedControlID"];
if (o != null) {
return (string)o;
}
return String.Empty;
}
set {
ViewState["PagedControlID"] = value;
}
}
internal IPage IPage {
get {
if (_page != null) {
return _page;
}
else {
Page page = Page;
if (page == null) {
throw new InvalidOperationException(AtlasWeb.Common_PageCannotBeNull);
}
return new PageWrapper(page);
}
}
}
[
DefaultValue(10),
WebCategory("Paging"),
ResourceDescription("DataPager_PageSize"),
]
public int PageSize {
get {
return _maximumRows;
}
set {
if (value < 1) {
throw new ArgumentOutOfRangeException("value");
}
if (value != _maximumRows) {
_maximumRows = value;
if (_initialized) {
CreatePagerFields();
SetPageProperties(_startRowIndex, _maximumRows, true);
}
}
}
}
[
WebCategory("Paging"),
DefaultValue(""),
ResourceDescription("DataPager_QueryStringField")
]
public string QueryStringField {
get {
object o = ViewState["QueryStringField"];
if (o != null) {
return (string)o;
}
return String.Empty;
}
set {
ViewState["QueryStringField"] = value;
}
}
internal bool QueryStringHandled {
get {
return _queryStringHandled;
}
set {
_queryStringHandled = value;
}
}
internal string QueryStringValue {
get {
if (DesignMode) {
return String.Empty;
}
return IPage.Request.QueryString[QueryStringField];
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int StartRowIndex {
get {
return _startRowIndex;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
protected virtual HtmlTextWriterTag TagKey {
get {
return HtmlTextWriterTag.Span;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int TotalRowCount {
get {
return _totalRowCount;
}
}
protected virtual void AddAttributesToRender(HtmlTextWriter writer) {
if (this.ID != null) {
writer.AddAttribute(HtmlTextWriterAttribute.Id, ClientID);
}
// add expando attributes
if (_attributes != null) {
AttributeCollection atrColl = Attributes;
IEnumerator keys = atrColl.Keys.GetEnumerator();
while (keys.MoveNext()) {
string attrName = (string)(keys.Current);
writer.AddAttribute(attrName, atrColl[attrName]);
}
}
}
protected virtual void ConnectToEvents(IPageableItemContainer container) {
if (container == null) {
throw new ArgumentNullException("container");
}
//
_pageableItemContainer.TotalRowCountAvailable += new EventHandler(OnTotalRowCountAvailable);
}
protected virtual void CreatePagerFields() {
_creatingPagerFields = true;
Controls.Clear();
if (_fields != null) {
foreach (DataPagerField field in _fields) {
DataPagerFieldItem fieldItem = new DataPagerFieldItem(field, this);
Controls.Add(fieldItem);
if (field.Visible) {
field.CreateDataPagers(fieldItem, _startRowIndex, _maximumRows, _totalRowCount, _fields.IndexOf(field));
fieldItem.DataBind();
}
}
}
_creatingPagerFields = false;
}
///
/// Perform our own databinding, then perform our child controls' databinding.
/// Does not call Base.DataBind(), since we need to call EnsureChildControls() between
/// OnDataBinding() and DataBindChildren().
///
public override void DataBind() {
OnDataBinding(EventArgs.Empty);
EnsureChildControls();
DataBindChildren();
}
protected virtual IPageableItemContainer FindPageableItemContainer() {
// the PagedControlID can be specified for finding a control within the same naming container
// when the pager control isn't inside the IPageableItemContainter.
if (!String.IsNullOrEmpty(PagedControlID)) {
// The IPageableItemContainer is found by FindControl if specified.
Control control = DataBoundControlHelper.FindControl(this, PagedControlID);
if (control == null) {
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.DataPager_PageableItemContainerNotFound, PagedControlID));
}
IPageableItemContainer container = control as IPageableItemContainer;
if (container == null) {
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.DataPager_ControlIsntPageable, PagedControlID));
}
return container;
}
else {
// Look to see if parent container is IPageableItemContainer
Control currentContainer = this.NamingContainer;
IPageableItemContainer foundContainer = null;
while (foundContainer == null && currentContainer != this.Page) {
if (currentContainer == null) {
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.DataPager_NoNamingContainer, ID));
}
foundContainer = currentContainer as IPageableItemContainer;
currentContainer = currentContainer.NamingContainer;
}
return foundContainer;
}
}
internal string GetQueryStringNavigateUrl(int pageNumber) {
if (_queryStringNavigateUrl == null) {
string queryStringField = QueryStringField;
StringBuilder sb = new StringBuilder();
if (DesignMode) {
sb.Append("?");
}
else {
bool methodGet = (IPage.Form != null) &&
IPage.Form.Method.Equals("GET", StringComparison.OrdinalIgnoreCase);
HttpRequestBase request = IPage.Request;
sb.Append(request.Path);
sb.Append("?");
foreach (string field in request.QueryString.AllKeys) {
// exclude query string postback data.
if (methodGet && ControlUtil.IsBuiltInHiddenField(field)) {
continue;
}
// append all query string fields except the current page.
if (!field.Equals(queryStringField, StringComparison.OrdinalIgnoreCase)) {
sb.Append(HttpUtility.UrlEncode(field));
sb.Append("=");
sb.Append(HttpUtility.UrlEncode(request.QueryString[field]));
sb.Append("&");
}
}
}
sb.Append(queryStringField);
sb.Append("=");
_queryStringNavigateUrl = sb.ToString();
}
return _queryStringNavigateUrl + pageNumber.ToString(CultureInfo.InvariantCulture);
}
///
/// Loads the control state for those properties that should persist across postbacks
/// even when EnableViewState=false.
///
protected internal override void LoadControlState(object savedState) {
// Any properties that could have been set in the persistance need to be
// restored to their defaults if they're not in ControlState, or they will
// be restored to their persisted state instead of their empty state.
_startRowIndex = 0;
_maximumRows = 10;
_totalRowCount = -1;
object[] state = savedState as object[];
if (state != null) {
base.LoadControlState(state[0]);
if (state[1] != null) {
_startRowIndex = (int)state[1];
}
if (state[2] != null) {
_maximumRows = (int)state[2];
}
if (state[3] != null) {
_totalRowCount = (int)state[3];
}
}
else {
base.LoadControlState(null);
}
if (_pageableItemContainer == null) {
_pageableItemContainer = FindPageableItemContainer();
if (_pageableItemContainer == null) {
throw new InvalidOperationException(AtlasWeb.DataPager_NoPageableItemContainer);
}
ConnectToEvents(_pageableItemContainer);
}
_pageableItemContainer.SetPageProperties(_startRowIndex, _maximumRows, false);
_setPageProperties = true;
}
bool HasAttributes {
get {
return (_attributes != null && _attributes.Count > 0);
}
}
protected override void LoadViewState(object savedState) {
if (savedState == null)
return;
object[] state = (object[])savedState;
base.LoadViewState(state[0]);
if (state[1] != null) {
((IStateManager)Fields).LoadViewState(state[1]);
}
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "1#")]
protected override bool OnBubbleEvent(object source, EventArgs e) {
DataPagerFieldCommandEventArgs cea = e as DataPagerFieldCommandEventArgs;
bool handled = false;
if (cea != null) {
DataPagerFieldItem item = cea.Item;
if (item != null && item.PagerField != null) {
item.PagerField.HandleEvent(cea);
handled = true;
}
}
return handled;
}
private void OnFieldsChanged(object source, EventArgs e) {
// force the paged control to rebind to pick up the changes.
if (_initialized) {
SetPageProperties(_startRowIndex, _maximumRows, true);
}
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")]
protected internal override void OnInit(EventArgs e) {
base.OnInit(e);
// We can't try to find another control in the designer in Init.
if (!DesignMode) {
_pageableItemContainer = FindPageableItemContainer();
if (_pageableItemContainer != null) {
ConnectToEvents(_pageableItemContainer);
_pageableItemContainer.SetPageProperties(_startRowIndex, _maximumRows, false);
_setPageProperties = true;
}
if (Page != null) {
Page.RegisterRequiresControlState(this);
}
}
_initialized = true;
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")]
protected internal override void OnLoad(EventArgs e) {
if (_pageableItemContainer == null) {
_pageableItemContainer = FindPageableItemContainer();
}
if (_pageableItemContainer == null) {
throw new InvalidOperationException(AtlasWeb.DataPager_NoPageableItemContainer);
}
if (!_setPageProperties) {
ConnectToEvents(_pageableItemContainer);
_pageableItemContainer.SetPageProperties(_startRowIndex, _maximumRows, false);
_setPageProperties = true;
}
base.OnLoad(e);
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "1#")]
protected virtual void OnTotalRowCountAvailable(object sender, PageEventArgs e) {
_totalRowCount = e.TotalRowCount;
_startRowIndex = e.StartRowIndex;
_maximumRows = e.MaximumRows;
if (_totalRowCount <= _startRowIndex && _totalRowCount > 0) {
// The last item got deleted or the results set changed and has fewer items. Move to the prior page.
int newStartIndex = _startRowIndex - _maximumRows;
if (newStartIndex < 0) {
newStartIndex = 0;
}
// If we can't just go back one page, go back to the first page. Most likely it's a new
// results set.
if (newStartIndex >= _totalRowCount) {
newStartIndex = 0;
}
_pageableItemContainer.SetPageProperties(newStartIndex, _maximumRows, true);
return;
}
if (!_creatingPagerFields) {
CreatePagerFields();
}
}
protected virtual void RecreateChildControls() {
ChildControlsCreated = false;
EnsureChildControls();
}
protected internal override void Render(HtmlTextWriter writer) {
if (DesignMode) {
EnsureChildControls();
// Call OnTotalRowCountAvailable at design time so we see the pager.
OnTotalRowCountAvailable(null, new PageEventArgs(0, PageSize, 101));
}
RenderBeginTag(writer);
RenderContents(writer);
writer.RenderEndTag();
}
public virtual void RenderBeginTag(HtmlTextWriter writer) {
AddAttributesToRender(writer);
writer.RenderBeginTag(TagKey);
}
protected virtual void RenderContents(HtmlTextWriter writer) {
base.Render(writer);
}
///
/// Saves the control state for those properties that should persist across postbacks
/// even when EnableViewState=false.
///
protected internal override object SaveControlState() {
object baseState = base.SaveControlState();
if (baseState != null ||
_startRowIndex != 0 ||
_maximumRows != 10 ||
_totalRowCount != -1) {
object[] state = new object[4];
state[0] = baseState;
state[1] = (_startRowIndex == 0) ? null : (object)_startRowIndex;
state[2] = (_maximumRows == 10) ? null : (object)_maximumRows;
state[3] = (_totalRowCount == -1) ? null : (object)_totalRowCount;
return state;
}
return null;
}
protected override object SaveViewState() {
// call base
object baseState = base.SaveViewState();
object myState = (_fields != null) ? ((IStateManager)_fields).SaveViewState() : null;
return new object[2] { baseState, myState };
}
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "databind",
Justification = "Cannot change to 'dataBind' as would break binary compatibility with legacy code.")]
public virtual void SetPageProperties(int startRowIndex, int maximumRows, bool databind) {
if (DesignMode) {
return;
}
if (_pageableItemContainer == null) {
throw new InvalidOperationException(AtlasWeb.DataPager_PagePropertiesCannotBeSet);
}
_startRowIndex = startRowIndex;
_maximumRows = maximumRows;
_pageableItemContainer.SetPageProperties(startRowIndex, maximumRows, databind);
}
protected override void TrackViewState() {
base.TrackViewState();
if (_fields != null) {
((IStateManager)_fields).TrackViewState();
}
}
#region ICompositeControlDesignerAccessor implementation
void ICompositeControlDesignerAccessor.RecreateChildControls() {
RecreateChildControls();
}
#endregion
#region IAttributeAccessor
///
/// Returns the attribute value of the list item control
/// having the specified attribute name.
///
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes",
Justification="Equivalent functionality is provided by public Attributes property.")]
string IAttributeAccessor.GetAttribute(string name) {
return Attributes[name];
}
///
/// Sets an attribute of the list
/// item control with the specified name and value.
///
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes",
Justification="Equivalent functionality is provided by public Attributes property.")]
void IAttributeAccessor.SetAttribute(string name, string value) {
Attributes[name] = value;
}
#endregion IAttributeAccessor
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.ComponentModel;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics.CodeAnalysis;
using System.Drawing;
using System.Drawing.Design;
using System.Globalization;
using System.Text;
using System.Web;
using System.Web.Resources;
using System.Web.UI;
namespace System.Web.UI.WebControls {
[
ParseChildren(true),
PersistChildren(false),
Themeable(true),
SupportsEventValidation,
Designer("System.Web.UI.Design.WebControls.DataPagerDesigner, " + AssemblyRef.SystemWebExtensionsDesign),
ToolboxBitmap(typeof(DataPager), "DataPager.ico"),
ToolboxItemFilterAttribute(AssemblyRef.SystemWebExtensions, ToolboxItemFilterType.Require),
]
[AspNetHostingPermission(System.Security.Permissions.SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(System.Security.Permissions.SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
public class DataPager : Control, IAttributeAccessor, INamingContainer, ICompositeControlDesignerAccessor {
private readonly new IPage _page;
private DataPagerFieldCollection _fields;
private IPageableItemContainer _pageableItemContainer;
private int _startRowIndex = 0;
private int _maximumRows = 10;
private int _totalRowCount;
private bool _setPageProperties = false;
private bool _initialized = false;
private AttributeCollection _attributes;
private bool _creatingPagerFields;
private bool _queryStringHandled;
private string _queryStringNavigateUrl;
public DataPager() {
}
internal DataPager(IPage page) {
_page = page;
}
///
/// Gets the collection of attribute name/value pairs expressed on the list item
/// control but not supported by the control's strongly typed properties.
///
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public AttributeCollection Attributes {
get {
if (_attributes == null)
_attributes = new AttributeCollection(new StateBag(true));
return _attributes;
}
}
///
/// Ensure that the child controls have been created before returning the controls collection
///
public override ControlCollection Controls {
get {
EnsureChildControls();
return base.Controls;
}
}
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.DataPagerFieldTypeEditor, " + AssemblyRef.SystemWebExtensionsDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
Category("Default"),
ResourceDescription("DataPager_Fields"),
]
public virtual DataPagerFieldCollection Fields {
get {
if (_fields == null) {
_fields = new DataPagerFieldCollection(this);
if (IsTrackingViewState) {
((IStateManager)_fields).TrackViewState();
}
_fields.FieldsChanged += new EventHandler(OnFieldsChanged);
}
return _fields;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int MaximumRows {
get {
return _maximumRows;
}
}
[
DefaultValue(""),
IDReferenceProperty(typeof(IPageableItemContainer)),
WebCategory("Paging"),
ResourceDescription("DataPager_PagedControlID"),
SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId="ID"),
Themeable(false),
]
public virtual string PagedControlID {
get {
object o = ViewState["PagedControlID"];
if (o != null) {
return (string)o;
}
return String.Empty;
}
set {
ViewState["PagedControlID"] = value;
}
}
internal IPage IPage {
get {
if (_page != null) {
return _page;
}
else {
Page page = Page;
if (page == null) {
throw new InvalidOperationException(AtlasWeb.Common_PageCannotBeNull);
}
return new PageWrapper(page);
}
}
}
[
DefaultValue(10),
WebCategory("Paging"),
ResourceDescription("DataPager_PageSize"),
]
public int PageSize {
get {
return _maximumRows;
}
set {
if (value < 1) {
throw new ArgumentOutOfRangeException("value");
}
if (value != _maximumRows) {
_maximumRows = value;
if (_initialized) {
CreatePagerFields();
SetPageProperties(_startRowIndex, _maximumRows, true);
}
}
}
}
[
WebCategory("Paging"),
DefaultValue(""),
ResourceDescription("DataPager_QueryStringField")
]
public string QueryStringField {
get {
object o = ViewState["QueryStringField"];
if (o != null) {
return (string)o;
}
return String.Empty;
}
set {
ViewState["QueryStringField"] = value;
}
}
internal bool QueryStringHandled {
get {
return _queryStringHandled;
}
set {
_queryStringHandled = value;
}
}
internal string QueryStringValue {
get {
if (DesignMode) {
return String.Empty;
}
return IPage.Request.QueryString[QueryStringField];
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int StartRowIndex {
get {
return _startRowIndex;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
protected virtual HtmlTextWriterTag TagKey {
get {
return HtmlTextWriterTag.Span;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int TotalRowCount {
get {
return _totalRowCount;
}
}
protected virtual void AddAttributesToRender(HtmlTextWriter writer) {
if (this.ID != null) {
writer.AddAttribute(HtmlTextWriterAttribute.Id, ClientID);
}
// add expando attributes
if (_attributes != null) {
AttributeCollection atrColl = Attributes;
IEnumerator keys = atrColl.Keys.GetEnumerator();
while (keys.MoveNext()) {
string attrName = (string)(keys.Current);
writer.AddAttribute(attrName, atrColl[attrName]);
}
}
}
protected virtual void ConnectToEvents(IPageableItemContainer container) {
if (container == null) {
throw new ArgumentNullException("container");
}
//
_pageableItemContainer.TotalRowCountAvailable += new EventHandler(OnTotalRowCountAvailable);
}
protected virtual void CreatePagerFields() {
_creatingPagerFields = true;
Controls.Clear();
if (_fields != null) {
foreach (DataPagerField field in _fields) {
DataPagerFieldItem fieldItem = new DataPagerFieldItem(field, this);
Controls.Add(fieldItem);
if (field.Visible) {
field.CreateDataPagers(fieldItem, _startRowIndex, _maximumRows, _totalRowCount, _fields.IndexOf(field));
fieldItem.DataBind();
}
}
}
_creatingPagerFields = false;
}
///
/// Perform our own databinding, then perform our child controls' databinding.
/// Does not call Base.DataBind(), since we need to call EnsureChildControls() between
/// OnDataBinding() and DataBindChildren().
///
public override void DataBind() {
OnDataBinding(EventArgs.Empty);
EnsureChildControls();
DataBindChildren();
}
protected virtual IPageableItemContainer FindPageableItemContainer() {
// the PagedControlID can be specified for finding a control within the same naming container
// when the pager control isn't inside the IPageableItemContainter.
if (!String.IsNullOrEmpty(PagedControlID)) {
// The IPageableItemContainer is found by FindControl if specified.
Control control = DataBoundControlHelper.FindControl(this, PagedControlID);
if (control == null) {
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.DataPager_PageableItemContainerNotFound, PagedControlID));
}
IPageableItemContainer container = control as IPageableItemContainer;
if (container == null) {
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.DataPager_ControlIsntPageable, PagedControlID));
}
return container;
}
else {
// Look to see if parent container is IPageableItemContainer
Control currentContainer = this.NamingContainer;
IPageableItemContainer foundContainer = null;
while (foundContainer == null && currentContainer != this.Page) {
if (currentContainer == null) {
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.DataPager_NoNamingContainer, ID));
}
foundContainer = currentContainer as IPageableItemContainer;
currentContainer = currentContainer.NamingContainer;
}
return foundContainer;
}
}
internal string GetQueryStringNavigateUrl(int pageNumber) {
if (_queryStringNavigateUrl == null) {
string queryStringField = QueryStringField;
StringBuilder sb = new StringBuilder();
if (DesignMode) {
sb.Append("?");
}
else {
bool methodGet = (IPage.Form != null) &&
IPage.Form.Method.Equals("GET", StringComparison.OrdinalIgnoreCase);
HttpRequestBase request = IPage.Request;
sb.Append(request.Path);
sb.Append("?");
foreach (string field in request.QueryString.AllKeys) {
// exclude query string postback data.
if (methodGet && ControlUtil.IsBuiltInHiddenField(field)) {
continue;
}
// append all query string fields except the current page.
if (!field.Equals(queryStringField, StringComparison.OrdinalIgnoreCase)) {
sb.Append(HttpUtility.UrlEncode(field));
sb.Append("=");
sb.Append(HttpUtility.UrlEncode(request.QueryString[field]));
sb.Append("&");
}
}
}
sb.Append(queryStringField);
sb.Append("=");
_queryStringNavigateUrl = sb.ToString();
}
return _queryStringNavigateUrl + pageNumber.ToString(CultureInfo.InvariantCulture);
}
///
/// Loads the control state for those properties that should persist across postbacks
/// even when EnableViewState=false.
///
protected internal override void LoadControlState(object savedState) {
// Any properties that could have been set in the persistance need to be
// restored to their defaults if they're not in ControlState, or they will
// be restored to their persisted state instead of their empty state.
_startRowIndex = 0;
_maximumRows = 10;
_totalRowCount = -1;
object[] state = savedState as object[];
if (state != null) {
base.LoadControlState(state[0]);
if (state[1] != null) {
_startRowIndex = (int)state[1];
}
if (state[2] != null) {
_maximumRows = (int)state[2];
}
if (state[3] != null) {
_totalRowCount = (int)state[3];
}
}
else {
base.LoadControlState(null);
}
if (_pageableItemContainer == null) {
_pageableItemContainer = FindPageableItemContainer();
if (_pageableItemContainer == null) {
throw new InvalidOperationException(AtlasWeb.DataPager_NoPageableItemContainer);
}
ConnectToEvents(_pageableItemContainer);
}
_pageableItemContainer.SetPageProperties(_startRowIndex, _maximumRows, false);
_setPageProperties = true;
}
bool HasAttributes {
get {
return (_attributes != null && _attributes.Count > 0);
}
}
protected override void LoadViewState(object savedState) {
if (savedState == null)
return;
object[] state = (object[])savedState;
base.LoadViewState(state[0]);
if (state[1] != null) {
((IStateManager)Fields).LoadViewState(state[1]);
}
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "1#")]
protected override bool OnBubbleEvent(object source, EventArgs e) {
DataPagerFieldCommandEventArgs cea = e as DataPagerFieldCommandEventArgs;
bool handled = false;
if (cea != null) {
DataPagerFieldItem item = cea.Item;
if (item != null && item.PagerField != null) {
item.PagerField.HandleEvent(cea);
handled = true;
}
}
return handled;
}
private void OnFieldsChanged(object source, EventArgs e) {
// force the paged control to rebind to pick up the changes.
if (_initialized) {
SetPageProperties(_startRowIndex, _maximumRows, true);
}
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")]
protected internal override void OnInit(EventArgs e) {
base.OnInit(e);
// We can't try to find another control in the designer in Init.
if (!DesignMode) {
_pageableItemContainer = FindPageableItemContainer();
if (_pageableItemContainer != null) {
ConnectToEvents(_pageableItemContainer);
_pageableItemContainer.SetPageProperties(_startRowIndex, _maximumRows, false);
_setPageProperties = true;
}
if (Page != null) {
Page.RegisterRequiresControlState(this);
}
}
_initialized = true;
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")]
protected internal override void OnLoad(EventArgs e) {
if (_pageableItemContainer == null) {
_pageableItemContainer = FindPageableItemContainer();
}
if (_pageableItemContainer == null) {
throw new InvalidOperationException(AtlasWeb.DataPager_NoPageableItemContainer);
}
if (!_setPageProperties) {
ConnectToEvents(_pageableItemContainer);
_pageableItemContainer.SetPageProperties(_startRowIndex, _maximumRows, false);
_setPageProperties = true;
}
base.OnLoad(e);
}
[SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "1#")]
protected virtual void OnTotalRowCountAvailable(object sender, PageEventArgs e) {
_totalRowCount = e.TotalRowCount;
_startRowIndex = e.StartRowIndex;
_maximumRows = e.MaximumRows;
if (_totalRowCount <= _startRowIndex && _totalRowCount > 0) {
// The last item got deleted or the results set changed and has fewer items. Move to the prior page.
int newStartIndex = _startRowIndex - _maximumRows;
if (newStartIndex < 0) {
newStartIndex = 0;
}
// If we can't just go back one page, go back to the first page. Most likely it's a new
// results set.
if (newStartIndex >= _totalRowCount) {
newStartIndex = 0;
}
_pageableItemContainer.SetPageProperties(newStartIndex, _maximumRows, true);
return;
}
if (!_creatingPagerFields) {
CreatePagerFields();
}
}
protected virtual void RecreateChildControls() {
ChildControlsCreated = false;
EnsureChildControls();
}
protected internal override void Render(HtmlTextWriter writer) {
if (DesignMode) {
EnsureChildControls();
// Call OnTotalRowCountAvailable at design time so we see the pager.
OnTotalRowCountAvailable(null, new PageEventArgs(0, PageSize, 101));
}
RenderBeginTag(writer);
RenderContents(writer);
writer.RenderEndTag();
}
public virtual void RenderBeginTag(HtmlTextWriter writer) {
AddAttributesToRender(writer);
writer.RenderBeginTag(TagKey);
}
protected virtual void RenderContents(HtmlTextWriter writer) {
base.Render(writer);
}
///
/// Saves the control state for those properties that should persist across postbacks
/// even when EnableViewState=false.
///
protected internal override object SaveControlState() {
object baseState = base.SaveControlState();
if (baseState != null ||
_startRowIndex != 0 ||
_maximumRows != 10 ||
_totalRowCount != -1) {
object[] state = new object[4];
state[0] = baseState;
state[1] = (_startRowIndex == 0) ? null : (object)_startRowIndex;
state[2] = (_maximumRows == 10) ? null : (object)_maximumRows;
state[3] = (_totalRowCount == -1) ? null : (object)_totalRowCount;
return state;
}
return null;
}
protected override object SaveViewState() {
// call base
object baseState = base.SaveViewState();
object myState = (_fields != null) ? ((IStateManager)_fields).SaveViewState() : null;
return new object[2] { baseState, myState };
}
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "databind",
Justification = "Cannot change to 'dataBind' as would break binary compatibility with legacy code.")]
public virtual void SetPageProperties(int startRowIndex, int maximumRows, bool databind) {
if (DesignMode) {
return;
}
if (_pageableItemContainer == null) {
throw new InvalidOperationException(AtlasWeb.DataPager_PagePropertiesCannotBeSet);
}
_startRowIndex = startRowIndex;
_maximumRows = maximumRows;
_pageableItemContainer.SetPageProperties(startRowIndex, maximumRows, databind);
}
protected override void TrackViewState() {
base.TrackViewState();
if (_fields != null) {
((IStateManager)_fields).TrackViewState();
}
}
#region ICompositeControlDesignerAccessor implementation
void ICompositeControlDesignerAccessor.RecreateChildControls() {
RecreateChildControls();
}
#endregion
#region IAttributeAccessor
///
/// Returns the attribute value of the list item control
/// having the specified attribute name.
///
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes",
Justification="Equivalent functionality is provided by public Attributes property.")]
string IAttributeAccessor.GetAttribute(string name) {
return Attributes[name];
}
///
/// Sets an attribute of the list
/// item control with the specified name and value.
///
[SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes",
Justification="Equivalent functionality is provided by public Attributes property.")]
void IAttributeAccessor.SetAttribute(string name, string value) {
Attributes[name] = value;
}
#endregion IAttributeAccessor
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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