Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / WebControls / DataGridDesigner.cs / 1 / DataGridDesigner.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.Design.WebControls { using System; using System.Design; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design; using System.Data; using System.Diagnostics; using System.Globalization; using System.IO; using System.Web.UI.Design; using System.Web.UI.WebControls; ////// /// [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)] [SupportsPreviewControl(true)] public class DataGridDesigner : BaseDataListDesigner { internal static TraceSwitch DataGridDesignerSwitch = new TraceSwitch("DATAGRIDDESIGNER", "Enable DataGrid designer general purpose traces."); private static string[] ColumnTemplateNames = new string[] { "ItemTemplate", "EditItemTemplate", "HeaderTemplate", "FooterTemplate" }; private const int IDX_HEADER_TEMPLATE = 2; private const int IDX_ITEM_TEMPLATE = 0; private const int IDX_EDITITEM_TEMPLATE = 1; private const int IDX_FOOTER_TEMPLATE = 3; #pragma warning disable 618 private TemplateEditingVerb[] templateVerbs; #pragma warning restore 618 private bool templateVerbsDirty; private static DesignerAutoFormatCollection _autoFormats; ////// This is the designer class for the ////// control. /// /// /// public DataGridDesigner() { templateVerbsDirty = true; } public override DesignerAutoFormatCollection AutoFormats { get { if (_autoFormats == null) { _autoFormats = CreateAutoFormats(AutoFormatSchemes.BDL_SCHEMES, delegate(DataRow schemeData) { return new DataGridAutoFormat(schemeData); }); } return _autoFormats; } } ////// Initializes a new instance of ///. /// [Obsolete("Use of this method is not recommended because template editing is handled in ControlDesigner. To support template editing expose template data in the TemplateGroups property and call SetViewFlags(ViewFlags.TemplateEditing, true). http://go.microsoft.com/fwlink/?linkid=14202")] protected override ITemplateEditingFrame CreateTemplateEditingFrame(TemplateEditingVerb verb) { ITemplateEditingService teService = (ITemplateEditingService)GetService(typeof(ITemplateEditingService)); Debug.Assert(teService != null, "How did we get this far without an ITemplateEditingService"); DataGrid grid = (DataGrid)ViewControl; Style[] templateStyles = new Style[] { grid.ItemStyle, grid.EditItemStyle, grid.HeaderStyle, grid.FooterStyle }; ITemplateEditingFrame editingFrame = teService.CreateFrame(this, verb.Text, ColumnTemplateNames, grid.ControlStyle, templateStyles); return editingFrame; } /// protected override void Dispose(bool disposing) { if (disposing) { DisposeTemplateVerbs(); } base.Dispose(disposing); } private void DisposeTemplateVerbs() { if (templateVerbs != null) { for (int i = 0; i < templateVerbs.Length; i++) { templateVerbs[i].Dispose(); } templateVerbs = null; templateVerbsDirty = true; } } /// [Obsolete("Use of this method is not recommended because template editing is handled in ControlDesigner. To support template editing expose template data in the TemplateGroups property and call SetViewFlags(ViewFlags.TemplateEditing, true). http://go.microsoft.com/fwlink/?linkid=14202")] protected override TemplateEditingVerb[] GetCachedTemplateEditingVerbs() { if (templateVerbsDirty == true) { DisposeTemplateVerbs(); DataGridColumnCollection columns = ((DataGrid)Component).Columns; int columnCount = columns.Count; if (columnCount > 0) { int templateColumns = 0; int i, t; for (i = 0; i < columnCount; i++) { if (columns[i] is TemplateColumn) { templateColumns++; } } if (templateColumns > 0) { templateVerbs = new TemplateEditingVerb[templateColumns]; for (i = 0, t = 0; i < columnCount; i++) { if (columns[i] is TemplateColumn) { string headerText = columns[i].HeaderText; string caption = "Columns[" + i.ToString(NumberFormatInfo.CurrentInfo) + "]"; if ((headerText != null) && (headerText.Length != 0)) { caption = caption + " - " + headerText; } templateVerbs[t] = new TemplateEditingVerb(caption, i, this); t++; } } } } templateVerbsDirty = false; } return templateVerbs; } /// /// /// public override string GetDesignTimeHtml() { int sampleRows = 5; DataGrid dataGrid = (DataGrid)ViewControl; // ensure there are enough sample rows to show an entire page, and still // have 1 more for a navigation button to be enabled // we also want to ensure we don't have something ridiculously large if (dataGrid.AllowPaging && dataGrid.PageSize != 0) { sampleRows = Math.Min(dataGrid.PageSize, 100) + 1; } bool dummyDataSource = false; IEnumerable designTimeDataSource = null; bool autoGenColumnsChanged = false; bool dataKeyFieldChanged = false; bool dataSourceIDChanged = false; DesignerDataSourceView view = DesignerView; bool oldAutoGenColumns = dataGrid.AutoGenerateColumns; string oldDataKeyField = String.Empty; string oldDataSourceID = String.Empty; string designTimeHTML = null; if (view == null) { designTimeDataSource = GetDesignTimeDataSource(sampleRows, out dummyDataSource); } else { try { designTimeDataSource = view.GetDesignTimeData(sampleRows, out dummyDataSource); } catch (Exception ex) { if (Component.Site != null) { IComponentDesignerDebugService debugService = (IComponentDesignerDebugService)Component.Site.GetService(typeof(IComponentDesignerDebugService)); if (debugService != null) { debugService.Fail(SR.GetString(SR.DataSource_DebugService_FailedCall, "DesignerDataSourceView.GetDesignTimeData", ex.Message)); } } } if (designTimeDataSource == null) { Debug.Assert(false, "DataBoundControlDesigner::GetDesignTimeHtml - DesignTimeDataSource was null."); return GetEmptyDesignTimeHtml(); } } if ((oldAutoGenColumns == false) && (dataGrid.Columns.Count == 0)) { // ensure that AutoGenerateColumns is true when we don't have // a columns collection, so we see atleast something at // design time. autoGenColumnsChanged = true; dataGrid.AutoGenerateColumns = true; } if (dummyDataSource) { oldDataKeyField = dataGrid.DataKeyField; if (oldDataKeyField.Length != 0) { dataKeyFieldChanged = true; dataGrid.DataKeyField = String.Empty; } } try { dataGrid.DataSource = designTimeDataSource; oldDataSourceID = dataGrid.DataSourceID; dataGrid.DataSourceID = String.Empty; dataSourceIDChanged = true; dataGrid.DataBind(); designTimeHTML = base.GetDesignTimeHtml(); } catch (Exception e) { designTimeHTML = GetErrorDesignTimeHtml(e); } finally { // restore settings we changed for rendering purposes dataGrid.DataSource = null; if (autoGenColumnsChanged) { dataGrid.AutoGenerateColumns = false; } if (dataKeyFieldChanged == true) { dataGrid.DataKeyField = oldDataKeyField; } if (dataSourceIDChanged == true) { dataGrid.DataSourceID = oldDataSourceID; } } return designTimeHTML; } ////// Gets the HTML to be used for the design time representation /// of the control. /// ////// /// protected override string GetEmptyDesignTimeHtml() { return CreatePlaceHolderDesignTimeHtml(null); } ////// /// protected override string GetErrorDesignTimeHtml(Exception e) { Debug.Fail(e.ToString()); return CreatePlaceHolderDesignTimeHtml(SR.GetString(SR.Control_ErrorRendering)); } ////// /// [Obsolete("Use of this method is not recommended because template editing is handled in ControlDesigner. To support template editing expose template data in the TemplateGroups property and call SetViewFlags(ViewFlags.TemplateEditing, true). http://go.microsoft.com/fwlink/?linkid=14202")] public override string GetTemplateContainerDataItemProperty(string templateName) { return "DataItem"; } ////// Gets the template's container's data item property. /// ////// /// [Obsolete("Use of this method is not recommended because template editing is handled in ControlDesigner. To support template editing expose template data in the TemplateGroups property and call SetViewFlags(ViewFlags.TemplateEditing, true). http://go.microsoft.com/fwlink/?linkid=14202")] public override string GetTemplateContent(ITemplateEditingFrame editingFrame, string templateName, out bool allowEditing) { allowEditing = true; DataGrid dataGrid = (DataGrid)Component; int columnIndex = editingFrame.Verb.Index; Debug.Assert((columnIndex >= 0) && (columnIndex < dataGrid.Columns.Count), "Invalid column index in template editing frame."); Debug.Assert(dataGrid.Columns[columnIndex] is TemplateColumn, "Template editing frame points to a non-TemplateColumn column."); TemplateColumn column = (TemplateColumn)dataGrid.Columns[columnIndex]; ITemplate template = null; string templateContent = String.Empty; if (templateName.Equals(ColumnTemplateNames[IDX_HEADER_TEMPLATE])) { template = column.HeaderTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_ITEM_TEMPLATE])) { template = column.ItemTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_EDITITEM_TEMPLATE])) { template = column.EditItemTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_FOOTER_TEMPLATE])) { template = column.FooterTemplate; } else { Debug.Fail("Unknown template name passed to GetTemplateContent"); } if (template != null) { templateContent = GetTextFromTemplate(template); } return templateContent; } ////// Gets the template's content. /// ///[Obsolete("Use of this method is not recommended because template editing is handled in ControlDesigner. To support template editing expose template data in the TemplateGroups property and call SetViewFlags(ViewFlags.TemplateEditing, true). http://go.microsoft.com/fwlink/?linkid=14202")] public override Type GetTemplatePropertyParentType(string templateName) { return typeof(TemplateColumn); } /// /// /// public virtual void OnColumnsChanged() { OnTemplateEditingVerbsChanged(); } ////// Notification that is called when the columns changed event occurs. /// ///protected override void OnTemplateEditingVerbsChanged() { templateVerbsDirty = true; } /// /// /// Initializes the designer with the DataGrid control that this instance /// of the designer is associated with. /// public override void Initialize(IComponent component) { VerifyInitializeArgument(component, typeof(DataGrid)); base.Initialize(component); } ////// /// [Obsolete("Use of this method is not recommended because template editing is handled in ControlDesigner. To support template editing expose template data in the TemplateGroups property and call SetViewFlags(ViewFlags.TemplateEditing, true). http://go.microsoft.com/fwlink/?linkid=14202")] public override void SetTemplateContent(ITemplateEditingFrame editingFrame, string templateName, string templateContent) { int columnIndex = editingFrame.Verb.Index; DataGrid dataGrid = (DataGrid)Component; Debug.Assert((columnIndex >= 0) && (columnIndex < dataGrid.Columns.Count), "Invalid column index in template editing frame."); Debug.Assert(dataGrid.Columns[columnIndex] is TemplateColumn, "Template editing frame points to a non-TemplateColumn column."); TemplateColumn column = (TemplateColumn)dataGrid.Columns[columnIndex]; ITemplate newTemplate = null; if ((templateContent != null) && (templateContent.Length != 0)) { ITemplate currentTemplate = null; // first get the current template so we can use it if we fail to parse the // new text into a template if (templateName.Equals(ColumnTemplateNames[IDX_HEADER_TEMPLATE])) { currentTemplate = column.HeaderTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_ITEM_TEMPLATE])) { currentTemplate = column.ItemTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_EDITITEM_TEMPLATE])) { currentTemplate = column.EditItemTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_FOOTER_TEMPLATE])) { currentTemplate = column.FooterTemplate; } // this will parse out a new template, and if it fails, it will // return currentTemplate itself newTemplate = GetTemplateFromText(templateContent, currentTemplate); } // Set the new template into the control. Note this may be null, if the // template content was empty, i.e., the user cleared out everything in the UI. if (templateName.Equals(ColumnTemplateNames[IDX_HEADER_TEMPLATE])) { column.HeaderTemplate = newTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_ITEM_TEMPLATE])) { column.ItemTemplate = newTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_EDITITEM_TEMPLATE])) { column.EditItemTemplate = newTemplate; } else if (templateName.Equals(ColumnTemplateNames[IDX_FOOTER_TEMPLATE])) { column.FooterTemplate = newTemplate; } else { Debug.Fail("Unknown template name passed to SetTemplateContent"); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved./// Sets the content for the specified template and frame. /// ///
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