Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/DataControlFieldHeaderCell.cs

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+//------------------------------------------------------------------------------
+// <copyright file="DataControlFieldHeaderCell.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Globalization;
+
+    /// <devdoc>
+    /// <para>Creates a special header cell that is contained within a DataControlField.</para>
+    /// </devdoc>
+    public class DataControlFieldHeaderCell : DataControlFieldCell {
+
+
+        public DataControlFieldHeaderCell(DataControlField containingField) : base(HtmlTextWriterTag.Th, containingField) {
+        }
+
+
+        /// <devdoc>
+        /// <para>
+        /// Sets the abbreviated text for a header cell. The abbreviated text 
+        /// is rendered with the HTML ABBR attribute. The ABBR attribute is important 
+        /// for screen readers since it allows them to read a shortened version of a header for each cell in the table.
+        /// </para>
+        /// </devdoc>
+        public virtual string AbbreviatedText {
+            get {
+                object x = ViewState["AbbrText"];
+                return((x == null) ? String.Empty : (string)x);
+            }
+            set {
+                ViewState["AbbrText"] = value;
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>
+        /// Represents the cells that the header applies to. Renders the HTML scope attribute. Possible values are from the TableHeaderScope enumeration: Column and Row.
+        /// </para>
+        /// </devdoc>
+        public virtual TableHeaderScope Scope {
+            get {
+                object x = ViewState["Scope"];
+                return((x == null) ? TableHeaderScope.NotSet : (TableHeaderScope)x);
+            }
+            set {
+                ViewState["Scope"] = value;
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Adds header cell attributes to the list of attributes to render.</para>
+        /// </devdoc>
+        protected override void AddAttributesToRender(HtmlTextWriter writer) {
+            base.AddAttributesToRender(writer);
+
+            TableHeaderScope scope = Scope;
+            if (scope != TableHeaderScope.NotSet) {
+                if (scope == TableHeaderScope.Column) {
+                    writer.AddAttribute(HtmlTextWriterAttribute.Scope, "col");
+                }
+                else {
+                    writer.AddAttribute(HtmlTextWriterAttribute.Scope, "row");
+                }
+            }
+
+            String abbr = AbbreviatedText;
+            if (!String.IsNullOrEmpty(abbr)) {
+                writer.AddAttribute(HtmlTextWriterAttribute.Abbr, abbr);
+            }
+        }
+    }
+}
+
+