Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.DynamicData/DynamicData/DefaultAutoFieldGenerator.cs

@@ -0,0 +1,68 @@
+namespace System.Web.DynamicData {
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Diagnostics;
+    using System.Web.DynamicData.Util;
+    using System.Web.UI;
+    using System.Web.UI.WebControls;
+
+    public class DefaultAutoFieldGenerator : IAutoFieldGenerator {
+        private IMetaTable _metaTable;
+
+        public DefaultAutoFieldGenerator(MetaTable table)
+            : this((IMetaTable)table) {
+        }
+
+        internal DefaultAutoFieldGenerator(IMetaTable table) {
+            if (table == null) {
+                throw new ArgumentNullException("table");
+            }
+            _metaTable = table;
+        }
+
+        public ICollection GenerateFields(Control control) {
+            DataBoundControlMode mode = GetMode(control);
+            ContainerType containerType = GetControlContainerType(control);
+
+            // Auto-generate fields from metadata.
+            List<DynamicField> fields = new List<DynamicField>();
+            foreach (MetaColumn column in _metaTable.GetScaffoldColumns(mode, containerType)) {
+                fields.Add(CreateField(column, containerType, mode));
+            }
+
+            return fields;
+        }
+
+        protected virtual DynamicField CreateField(MetaColumn column, ContainerType containerType, DataBoundControlMode mode) {            
+            string headerText = (containerType == ContainerType.List ? column.ShortDisplayName : column.DisplayName);
+
+            var field = new DynamicField() {
+                DataField = column.Name,
+                HeaderText = headerText
+            };
+            // Turn wrapping off by default so that error messages don't show up on the next line.
+            field.ItemStyle.Wrap = false;
+
+            return field;
+        }
+
+        internal static ContainerType GetControlContainerType(Control control) {
+            if (control is IDataBoundListControl || control is Repeater) {
+                return ContainerType.List;
+            } else if (control is IDataBoundItemControl) {
+                return ContainerType.Item;
+            }
+            return ContainerType.List;
+        }
+
+        internal static DataBoundControlMode GetMode(Control control) {
+            // Only item controls have distinct modes
+            IDataBoundItemControl itemControl = control as IDataBoundItemControl;
+            if (itemControl != null && GetControlContainerType(control) != ContainerType.List) {
+                return itemControl.Mode;
+            }
+
+            return DataBoundControlMode.ReadOnly;
+        }
+    }
+}