NumericPagerField.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / Orcas / RTM / ndp / fx / src / xsp / System / Web / Extensions / ui / webcontrols / NumericPagerField.cs / 3 / NumericPagerField.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.ComponentModel; 
using System.Diagnostics.CodeAnalysis;
using System.Drawing.Design; 
using System.Globalization;
using System.Web;
using System.Web.Resources;
using System.Web.UI; 

namespace System.Web.UI.WebControls { 
    [AspNetHostingPermission(System.Security.Permissions.SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [AspNetHostingPermission(System.Security.Permissions.SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public class NumericPagerField : DataPagerField { 
        private int _startRowIndex;
        private int _maximumRows;
        private int _totalRowCount;
 
        public NumericPagerField() {
        } 
 
        [
        DefaultValue(5), 
        Category("Appearance"),
        ResourceDescription("NumericPagerField_ButtonCount"),
        ]
        public int ButtonCount { 
            get {
                object o = ViewState["ButtonCount"]; 
                if (o != null) { 
                    return (int)o;
                } 
                return 5;
            }
            set {
                if (value < 1) { 
                    throw new ArgumentOutOfRangeException("value");
                } 
                if (value != ButtonCount) { 
                    ViewState["ButtonCount"] = value;
                    OnFieldChanged(); 
                }
            }
        }
 
        /// 
        /// Indicates the button type for the field. 
        ///  
        [
        Category("Appearance"), 
        DefaultValue(ButtonType.Link),
        ResourceDescription("NumericPagerField_ButtonType"),
        ]
        public ButtonType ButtonType { 
            get {
                object o = ViewState["ButtonType"]; 
                if (o != null) 
                    return(ButtonType)o;
                return ButtonType.Link; 
            }
            set {
                if (value < ButtonType.Button || value > ButtonType.Link) {
                    throw new ArgumentOutOfRangeException("value"); 
                }
                if (value != ButtonType) { 
                    ViewState["ButtonType"] = value; 
                    OnFieldChanged();
                } 
            }
        }

        [ 
        Category("Appearance"),
        DefaultValue(""), 
        ResourceDescription("NumericPagerField_CurrentPageLabelCssClass"), 
        CssClassPropertyAttribute
        ] 
        public string CurrentPageLabelCssClass {
            get {
                object o = ViewState["CurrentPageLabelCssClass"];
                if (o != null) { 
                    return (string)o;
                } 
                return String.Empty; 
            }
            set { 
                if (value != CurrentPageLabelCssClass) {
                    ViewState["CurrentPageLabelCssClass"] = value;
                    OnFieldChanged();
                } 
            }
        } 
 
        [
        Category("Appearance"), 
        DefaultValue(""),
        Editor(typeof(System.Web.UI.Design.ImageUrlEditor), typeof(UITypeEditor)),
        ResourceDescription("NumericPagerField_NextPageImageUrl"),
        SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings", 
                        Justification = "Required by ASP.NET parser."),
        UrlProperty() 
        ] 
        public string NextPageImageUrl {
            get { 
                object o = ViewState["NextPageImageUrl"];
                if (o != null) {
                    return (string)o;
                } 
                return String.Empty;
            } 
            set { 
                if (value != NextPageImageUrl) {
                    ViewState["NextPageImageUrl"] = value; 
                    OnFieldChanged();
                }
            }
        } 

        [ 
        Category("Appearance"), 
        Localizable(true),
        ResourceDefaultValue("NumericPagerField_DefaultNextPageText"), 
        ResourceDescription("NumericPagerField_NextPageText")
        ]
        public string NextPageText {
            get { 
                object o = ViewState["NextPageText"];
                if (o != null) { 
                    return (string)o; 
                }
                return AtlasWeb.NumericPagerField_DefaultNextPageText; 
            }
            set {
                if (value != NextPageText) {
                    ViewState["NextPageText"] = value; 
                    OnFieldChanged();
                } 
            } 
        }
 
        [
        Category("Appearance"),
        DefaultValue(""),
        ResourceDescription("NumericPagerField_NextPreviousButtonCssClass"), 
        CssClassPropertyAttribute
        ] 
        public string NextPreviousButtonCssClass { 
            get {
                object o = ViewState["NextPreviousButtonCssClass"]; 
                if (o != null) {
                    return (string)o;
                }
                return String.Empty; 
            }
            set { 
                if (value != NextPreviousButtonCssClass) { 
                    ViewState["NextPreviousButtonCssClass"] = value;
                    OnFieldChanged(); 
                }
            }
        }
 
        [
        Category("Appearance"), 
        DefaultValue(""), 
        ResourceDescription("NumericPagerField_NumericButtonCssClass"),
        CssClassPropertyAttribute 
        ]
        public string NumericButtonCssClass {
            get {
                object o = ViewState["NumericButtonCssClass"]; 
                if (o != null) {
                    return (string)o; 
                } 
                return String.Empty;
            } 
            set {
                if (value != NumericButtonCssClass) {
                    ViewState["NumericButtonCssClass"] = value;
                    OnFieldChanged(); 
                }
            } 
        } 

        [ 
        Category("Appearance"),
        DefaultValue(""),
        Editor(typeof(System.Web.UI.Design.ImageUrlEditor), typeof(UITypeEditor)),
        ResourceDescription("NumericPagerField_PreviousPageImageUrl"), 
        SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings",
                        Justification = "Required by ASP.NET parser."), 
        UrlProperty() 
        ]
        public string PreviousPageImageUrl { 
            get {
                object o = ViewState["PreviousPageImageUrl"];
                if (o != null) {
                    return (string)o; 
                }
                return String.Empty; 
            } 
            set {
                if (value != PreviousPageImageUrl) { 
                    ViewState["PreviousPageImageUrl"] = value;
                    OnFieldChanged();
                }
            } 
        }
 
        [ 
        Category("Appearance"),
        Localizable(true), 
        ResourceDefaultValue("NumericPagerField_DefaultPreviousPageText"),
        ResourceDescription("NumericPagerField_PreviousPageText")
        ]
        public string PreviousPageText { 
            get {
                object o = ViewState["PreviousPageText"]; 
                if (o != null) { 
                    return (string)o;
                } 
                return AtlasWeb.NumericPagerField_DefaultPreviousPageText;
            }
            set {
                if (value != PreviousPageText) { 
                    ViewState["PreviousPageText"] = value;
                    OnFieldChanged(); 
                } 
            }
        } 

        [
        DefaultValue(true),
        Category("Behavior"), 
        ResourceDescription("NumericPagerField_RenderNonBreakingSpacesBetweenControls"),
        ] 
        public bool RenderNonBreakingSpacesBetweenControls { 
            get {
                object o = ViewState["RenderNonBreakingSpacesBetweenControls"]; 
                if (o != null) {
                    return (bool)o;
                }
                return true; 
            }
            set { 
                if (value != RenderNonBreakingSpacesBetweenControls) { 
                    ViewState["RenderNonBreakingSpacesBetweenControls"] = value;
                    OnFieldChanged(); 
                }
            }
        }
 
        [
        SuppressMessage("Microsoft.Usage", "CA2204:LiteralsShouldBeSpelledCorrectly", MessageId = "nbsp", 
                        Justification = "Literal is HTML escape sequence."), 
        SuppressMessage("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters",
                        MessageId = "System.Web.UI.LiteralControl.#ctor(System.String)", 
                        Justification = "Literal is HTML escape sequence.")
        ]
        private void AddNonBreakingSpace(DataPagerFieldItem container) {
            if (RenderNonBreakingSpacesBetweenControls) { 
                container.Controls.Add(new LiteralControl(" "));
            } 
        } 

        protected override void CopyProperties(DataPagerField newField) { 
            ((NumericPagerField)newField).ButtonCount = ButtonCount;
            ((NumericPagerField)newField).ButtonType = ButtonType;
            ((NumericPagerField)newField).CurrentPageLabelCssClass = CurrentPageLabelCssClass;
            ((NumericPagerField)newField).NextPageImageUrl = NextPageImageUrl; 
            ((NumericPagerField)newField).NextPageText = NextPageText;
            ((NumericPagerField)newField).NextPreviousButtonCssClass = NextPreviousButtonCssClass; 
            ((NumericPagerField)newField).NumericButtonCssClass = NumericButtonCssClass; 
            ((NumericPagerField)newField).PreviousPageImageUrl = PreviousPageImageUrl;
            ((NumericPagerField)newField).PreviousPageText = PreviousPageText; 

            base.CopyProperties(newField);
        }
 
        protected override DataPagerField CreateField() {
            return new NumericPagerField(); 
        } 

        [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")] 
        public override void HandleEvent(CommandEventArgs e) {
            if (String.IsNullOrEmpty(DataPager.QueryStringField)) {
                int newStartRowIndex = -1;
                int currentPageIndex = _startRowIndex / DataPager.PageSize; 
                int firstButtonIndex = (_startRowIndex / (ButtonCount * DataPager.PageSize)) * ButtonCount;
                int lastButtonIndex = firstButtonIndex + ButtonCount - 1; 
                int lastRecordIndex = ((lastButtonIndex + 1) * DataPager.PageSize) - 1; 

                if (String.Equals(e.CommandName, DataControlCommands.PreviousPageCommandArgument)) { 
                    newStartRowIndex = (firstButtonIndex - 1) * DataPager.PageSize;
                    if (newStartRowIndex < 0) {
                        newStartRowIndex = 0;
                    } 
                }
                else if (String.Equals(e.CommandName, DataControlCommands.NextPageCommandArgument)) { 
                    newStartRowIndex = lastRecordIndex + 1; 
                    if (newStartRowIndex > _totalRowCount) {
                        newStartRowIndex = _totalRowCount - DataPager.PageSize; 
                    }
                }
                else {
                    int pageIndex = Convert.ToInt32(e.CommandName, CultureInfo.InvariantCulture); 
                    newStartRowIndex = pageIndex * DataPager.PageSize;
                } 
 
                if (newStartRowIndex != -1) {
                    DataPager.SetPageProperties(newStartRowIndex, DataPager.PageSize, true); 
                }
            }
        }
 
        private Control CreateNumericButton(string buttonText, string commandArgument, string commandName) {
            IButtonControl button; 
 
            switch (ButtonType) {
            case ButtonType.Button: 
                button = new Button();
                break;
            case ButtonType.Link:
            default: 
                button = new LinkButton();
                break; 
            } 

            button.Text = buttonText; 
            button.CommandName = commandName;
            button.CommandArgument = commandArgument;

            WebControl webControl = button as WebControl; 
            if (webControl != null && !String.IsNullOrEmpty(NumericButtonCssClass)) {
                webControl.CssClass = NumericButtonCssClass; 
            } 

            return button as Control; 
        }

        private HyperLink CreateNumericLink(int pageIndex) {
            int pageNumber = pageIndex + 1; 
            HyperLink link = new HyperLink();
            link.Text = pageNumber.ToString(CultureInfo.InvariantCulture); 
            link.NavigateUrl = GetQueryStringNavigateUrl(pageNumber); 

            if (!String.IsNullOrEmpty(NumericButtonCssClass)) { 
                link.CssClass = NumericButtonCssClass;
            }

            return link; 
        }
 
        private Control CreateNextPrevButton(string buttonText, string commandName, string commandArgument, string imageUrl) { 
            IButtonControl button;
 
            switch (ButtonType) {
            case ButtonType.Link:
                button = new LinkButton();
                break; 
            case ButtonType.Button:
                button = new Button(); 
                break; 
            case ButtonType.Image:
            default: 
                button = new ImageButton();
                ((ImageButton)button).ImageUrl = imageUrl;
                ((ImageButton)button).AlternateText = HttpUtility.HtmlDecode(buttonText);
                break; 
            }
            button.Text = buttonText; 
            button.CommandName = commandName; 
            button.CommandArgument = commandArgument;
 
            WebControl webControl = button as WebControl;
            if (webControl != null && !String.IsNullOrEmpty(NextPreviousButtonCssClass)) {
                webControl.CssClass = NextPreviousButtonCssClass;
            } 

            return button as Control; 
        } 

        private HyperLink CreateNextPrevLink(string buttonText, int pageIndex, string imageUrl) { 
            int pageNumber = pageIndex + 1;
            HyperLink link = new HyperLink();
            link.Text = buttonText;
            link.NavigateUrl = GetQueryStringNavigateUrl(pageNumber); 
            link.ImageUrl = imageUrl;
            if (!String.IsNullOrEmpty(NextPreviousButtonCssClass)) { 
                link.CssClass = NextPreviousButtonCssClass; 
            }
            return link; 
        }

        public override void CreateDataPagers(DataPagerFieldItem container, int startRowIndex, int maximumRows, int totalRowCount, int fieldIndex) {
            _startRowIndex = startRowIndex; 
            _maximumRows = maximumRows;
            _totalRowCount = totalRowCount; 
 
            if (String.IsNullOrEmpty(DataPager.QueryStringField)) {
                CreateDataPagersForCommand(container, fieldIndex); 
            }
            else {
                CreateDataPagersForQueryString(container, fieldIndex);
            } 
        }
 
        private void CreateDataPagersForCommand(DataPagerFieldItem container, int fieldIndex) { 
            int currentPageIndex = _startRowIndex / _maximumRows;
            int firstButtonIndex = (_startRowIndex / (ButtonCount * _maximumRows)) * ButtonCount; 
            int lastButtonIndex = firstButtonIndex + ButtonCount - 1;
            int lastRecordIndex = ((lastButtonIndex + 1) * _maximumRows) - 1;

            if (firstButtonIndex != 0) { 
                container.Controls.Add(CreateNextPrevButton(PreviousPageText, DataControlCommands.PreviousPageCommandArgument, fieldIndex.ToString(CultureInfo.InvariantCulture), PreviousPageImageUrl));
                AddNonBreakingSpace(container); 
            } 

            for (int i = 0; i < ButtonCount && _totalRowCount > ((i + firstButtonIndex) * _maximumRows); i++) { 
                if (i + firstButtonIndex == currentPageIndex) {
                    Label pageNumber = new Label();
                    pageNumber.Text = (i + firstButtonIndex + 1).ToString(CultureInfo.InvariantCulture);
                    if (!String.IsNullOrEmpty(CurrentPageLabelCssClass)) { 
                        pageNumber.CssClass = CurrentPageLabelCssClass;
                    } 
                    container.Controls.Add(pageNumber); 
                }
                else { 
                    container.Controls.Add(CreateNumericButton((i + firstButtonIndex + 1).ToString(CultureInfo.InvariantCulture), fieldIndex.ToString(CultureInfo.InvariantCulture), (i + firstButtonIndex).ToString(CultureInfo.InvariantCulture)));
                }
                AddNonBreakingSpace(container);
            } 

            if (lastRecordIndex < _totalRowCount - 1) { 
                AddNonBreakingSpace(container); 
                container.Controls.Add(CreateNextPrevButton(NextPageText, DataControlCommands.NextPageCommandArgument, fieldIndex.ToString(CultureInfo.InvariantCulture), NextPageImageUrl));
                AddNonBreakingSpace(container); 
            }
        }

        private void CreateDataPagersForQueryString(DataPagerFieldItem container, int fieldIndex) { 
            int currentPageIndex = _startRowIndex / _maximumRows;
            bool resetProperties = false; 
            if (!QueryStringHandled) { 
                int currentQSPageIndex;
                QueryStringHandled = true; 
                bool parsed = Int32.TryParse(QueryStringValue, out currentQSPageIndex);
                if (parsed) {
                    currentQSPageIndex--;//convert page number to page index.
                    int highestPageIndex = (_totalRowCount - 1) / _maximumRows; 
                    if ((currentQSPageIndex >= 0) && (currentQSPageIndex <= highestPageIndex)) {
                        currentPageIndex = currentQSPageIndex; 
                        _startRowIndex = (currentPageIndex * _maximumRows); 
                        resetProperties = true;
                    } 
                }
            }

            int firstButtonIndex = (_startRowIndex / (ButtonCount * _maximumRows)) * ButtonCount; 
            int lastButtonIndex = firstButtonIndex + ButtonCount - 1;
            int lastRecordIndex = ((lastButtonIndex + 1) * _maximumRows) - 1; 
 
            if (firstButtonIndex != 0) {
                container.Controls.Add(CreateNextPrevLink(PreviousPageText, firstButtonIndex - 1, PreviousPageImageUrl)); 
                AddNonBreakingSpace(container);
            }

            for (int i = 0; i < ButtonCount && _totalRowCount > ((i + firstButtonIndex) * _maximumRows); i++) { 
                if (i + firstButtonIndex == currentPageIndex) {
                    Label pageNumber = new Label(); 
                    pageNumber.Text = (i + firstButtonIndex + 1).ToString(CultureInfo.InvariantCulture); 
                    if (!String.IsNullOrEmpty(CurrentPageLabelCssClass)) {
                        pageNumber.CssClass = CurrentPageLabelCssClass; 
                    }
                    container.Controls.Add(pageNumber);
                }
                else { 
                    container.Controls.Add(CreateNumericLink(i + firstButtonIndex));
                } 
                AddNonBreakingSpace(container); 
            }
 
            if (lastRecordIndex < _totalRowCount - 1) {
                AddNonBreakingSpace(container);
                container.Controls.Add(CreateNextPrevLink(NextPageText, firstButtonIndex + ButtonCount, NextPageImageUrl));
                AddNonBreakingSpace(container); 
            }
 
            if (resetProperties) { 
                DataPager.SetPageProperties(_startRowIndex, _maximumRows, true);
            } 
        }

        // Required for design-time support (DesignerPagerStyle)
        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] 
        public override bool Equals(object o) {
            NumericPagerField field = o as NumericPagerField; 
            if (field != null) { 
                if (String.Equals(field.ButtonCount, this.ButtonCount) &&
                    field.ButtonType == this.ButtonType && 
                    String.Equals(field.CurrentPageLabelCssClass, this.CurrentPageLabelCssClass) &&
                    String.Equals(field.NextPageImageUrl, this.NextPageImageUrl) &&
                    String.Equals(field.NextPageText, this.NextPageText) &&
                    String.Equals(field.NextPreviousButtonCssClass, this.NextPreviousButtonCssClass) && 
                    String.Equals(field.NumericButtonCssClass, this.NumericButtonCssClass) &&
                    String.Equals(field.PreviousPageImageUrl, this.PreviousPageImageUrl) && 
                    String.Equals(field.PreviousPageText, this.PreviousPageText)) { 
                    return true;
                } 
            }
            return false;
        }
 
        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
        public override int GetHashCode() { 
            return 
                this.ButtonCount.GetHashCode() |
                this.ButtonType.GetHashCode() | 
                this.CurrentPageLabelCssClass.GetHashCode() |
                this.NextPageImageUrl.GetHashCode() |
                this.NextPageText.GetHashCode() |
                this.NextPreviousButtonCssClass.GetHashCode() | 
                this.NumericButtonCssClass.GetHashCode() |
                this.PreviousPageImageUrl.GetHashCode() | 
                this.PreviousPageText.GetHashCode(); 
        }
 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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