286 lines
8.6 KiB
C#
286 lines
8.6 KiB
C#
//
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// System.Web.UI.WebControls.HyperLinkField.cs
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//
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// Authors:
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// Lluis Sanchez Gual (lluis@novell.com)
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//
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// (C) 2005-2010 Novell, Inc (http://www.novell.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections;
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using System.Collections.Specialized;
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using System.Web.UI;
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using System.ComponentModel;
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using System.Security.Permissions;
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using System.Reflection;
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namespace System.Web.UI.WebControls
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{
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[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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public class HyperLinkField : DataControlField
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{
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PropertyDescriptor textProperty;
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PropertyDescriptor[] urlProperties;
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static string[] emptyFields;
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public override bool Initialize (bool enableSorting, Control control)
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{
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return base.Initialize (enableSorting, control);
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}
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[EditorAttribute ("System.Web.UI.Design.WebControls.DataFieldEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
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[TypeConverterAttribute (typeof(StringArrayConverter))]
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[WebCategoryAttribute ("Data")]
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[DefaultValueAttribute (null)]
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public virtual string[] DataNavigateUrlFields {
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get {
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object ob = ViewState ["DataNavigateUrlFields"];
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if (ob != null)
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return (string[]) ob;
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if (emptyFields == null)
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emptyFields = new string[0];
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return emptyFields;
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}
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set {
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ViewState ["DataNavigateUrlFields"] = value;
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OnFieldChanged ();
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}
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}
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[DefaultValueAttribute ("")]
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[WebCategoryAttribute ("Data")]
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public virtual string DataNavigateUrlFormatString {
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get {
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object ob = ViewState ["DataNavigateUrlFormatString"];
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if (ob != null)
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return (string) ob;
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return String.Empty;
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}
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set {
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ViewState ["DataNavigateUrlFormatString"] = value;
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OnFieldChanged ();
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}
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}
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[WebCategoryAttribute ("Data")]
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[DefaultValueAttribute ("")]
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[TypeConverterAttribute ("System.Web.UI.Design.DataSourceViewSchemaConverter, " + Consts.AssemblySystem_Design)]
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public virtual string DataTextField {
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get {
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object ob = ViewState ["DataTextField"];
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if (ob != null)
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return (string) ob;
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return String.Empty;
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}
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set {
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ViewState ["DataTextField"] = value;
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OnFieldChanged ();
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}
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}
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[DefaultValueAttribute ("")]
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[WebCategoryAttribute ("Data")]
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public virtual string DataTextFormatString {
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get {
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object ob = ViewState ["DataTextFormatString"];
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if (ob != null)
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return (string) ob;
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return String.Empty;
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}
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set {
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ViewState ["DataTextFormatString"] = value;
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OnFieldChanged ();
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}
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}
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[DefaultValueAttribute ("")]
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[EditorAttribute ("System.Web.UI.Design.UrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
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[UrlPropertyAttribute]
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[WebCategoryAttribute ("Behavior")]
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public virtual string NavigateUrl {
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get {
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object ob = ViewState ["NavigateUrl"];
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if (ob != null)
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return (string) ob;
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return String.Empty;
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}
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set {
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ViewState ["NavigateUrl"] = value;
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OnFieldChanged ();
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}
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}
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[DefaultValueAttribute ("")]
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[WebCategoryAttribute ("Behavior")]
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[TypeConverterAttribute (typeof(TargetConverter))]
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public virtual string Target {
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get {
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object ob = ViewState ["Target"];
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if (ob != null)
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return (string) ob;
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return String.Empty;
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}
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set {
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ViewState ["Target"] = value;
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OnFieldChanged ();
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}
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}
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[LocalizableAttribute (true)]
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[DefaultValueAttribute ("")]
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[WebCategoryAttribute ("Appearance")]
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public virtual string Text {
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get {
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object ob = ViewState ["Text"];
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if (ob != null)
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return (string) ob;
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return String.Empty;
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}
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set {
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ViewState ["Text"] = value;
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OnFieldChanged ();
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}
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}
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public override void InitializeCell (DataControlFieldCell cell,DataControlCellType cellType, DataControlRowState rowState, int rowIndex)
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{
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base.InitializeCell (cell, cellType, rowState, rowIndex);
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if (cellType == DataControlCellType.DataCell) {
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HyperLink link = new HyperLink ();
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bool bind = false;
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if (Target.Length > 0)
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link.Target = Target;
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if (DataTextField.Length > 0)
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bind = true;
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else
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link.Text = Text;
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string [] fields = DataNavigateUrlFields;
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if (fields.Length > 0)
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bind = true;
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else
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link.NavigateUrl = NavigateUrl;
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if (bind && cellType == DataControlCellType.DataCell && (rowState & DataControlRowState.Insert) == 0)
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cell.DataBinding += new EventHandler (OnDataBindField);
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link.ControlStyle.CopyFrom (ControlStyle);
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cell.Controls.Add (link);
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}
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}
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protected virtual string FormatDataNavigateUrlValue (object[] dataUrlValues)
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{
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if (dataUrlValues == null || dataUrlValues.Length == 0)
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return String.Empty;
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else if (DataNavigateUrlFormatString.Length > 0)
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return string.Format (DataNavigateUrlFormatString, dataUrlValues);
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else
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return dataUrlValues[0].ToString ();
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}
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protected virtual string FormatDataTextValue (object dataTextValue)
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{
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if (DataTextFormatString.Length > 0)
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return string.Format (DataTextFormatString, dataTextValue);
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else if (dataTextValue == null)
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return String.Empty;
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else
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return dataTextValue.ToString ();
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}
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void OnDataBindField (object sender, EventArgs e)
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{
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DataControlFieldCell cell = (DataControlFieldCell) sender;
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HyperLink link = (HyperLink) cell.Controls [0];
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object controlContainer = cell.BindingContainer;
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object item = DataBinder.GetDataItem (controlContainer);
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if (DataTextField.Length > 0) {
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if (textProperty == null) SetupProperties (controlContainer);
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link.Text = FormatDataTextValue (textProperty.GetValue (item));
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}
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string[] urlFields = DataNavigateUrlFields;
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if (urlFields.Length > 0) {
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if (urlProperties == null) SetupProperties (controlContainer);
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object[] dataUrlValues = new object [urlFields.Length];
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for (int n=0; n<dataUrlValues.Length; n++)
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dataUrlValues [n] = urlProperties [n].GetValue (item);
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link.NavigateUrl = FormatDataNavigateUrlValue (dataUrlValues);
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}
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}
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void SetupProperties (object controlContainer)
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{
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object item = DataBinder.GetDataItem (controlContainer);
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PropertyDescriptorCollection props = TypeDescriptor.GetProperties (item);
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if (DataTextField.Length > 0) {
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textProperty = props.Find (DataTextField, true);
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if (textProperty == null)
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throw new InvalidOperationException ("Property '" + DataTextField + "' not found in object of type " + item.GetType());
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}
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string[] urlFields = DataNavigateUrlFields;
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if (urlFields.Length > 0) {
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urlProperties = new PropertyDescriptor [urlFields.Length];
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for (int n=0; n<urlFields.Length; n++) {
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PropertyDescriptor prop = props.Find (urlFields [n], true);
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if (prop == null)
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throw new InvalidOperationException ("Property '" + urlFields [n] + "' not found in object of type " + item.GetType());
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urlProperties [n] = prop;
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}
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}
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}
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protected override DataControlField CreateField ()
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{
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return new HyperLinkField ();
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}
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protected override void CopyProperties (DataControlField newField)
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{
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base.CopyProperties (newField);
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HyperLinkField field = (HyperLinkField) newField;
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field.DataNavigateUrlFields = DataNavigateUrlFields;
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field.DataNavigateUrlFormatString = DataNavigateUrlFormatString;
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field.DataTextField = DataTextField;
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field.DataTextFormatString = DataTextFormatString;
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field.NavigateUrl = NavigateUrl;
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field.Target = Target;
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field.Text = Text;
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}
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public override void ValidateSupportsCallback ()
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{
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}
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}
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}
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