Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,250 @@
+//------------------------------------------------------------------------------
+// <copyright file="AutoGeneratedField.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections;    
+    using System.Collections.Specialized;    
+    using System.ComponentModel;
+
+    /// <devdoc>
+    /// <para>Creates a field bounded to a data field in a <see cref='System.Web.UI.WebControls.DataBoundControl'/>.</para>
+    /// </devdoc>
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public sealed class AutoGeneratedField : BoundField {
+        
+        private bool _suppressPropertyThrows = false;
+        private bool _useCheckBox;
+        private bool _useCheckBoxValid;
+        
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of a <see cref='System.Web.UI.WebControls.BoundField'/> class.</para>
+        /// </devdoc>
+        public AutoGeneratedField(string dataField) {
+            DataField = dataField;
+        }
+
+
+        /// <devdoc>
+        /// <para>Gets or sets the display format of data in this
+        /// field.</para>
+        /// </devdoc>
+        public override string DataFormatString {
+            get {
+                return base.DataFormatString;
+            }
+            set {
+                if (!_suppressPropertyThrows) {
+                    throw new NotSupportedException();
+                }
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Gets or sets the type of data being displayed by the field.</para>
+        /// </devdoc>
+        public Type DataType {
+            get {
+                object o = ViewState["DataType"];
+                if (o != null) {
+                    return (Type)o;
+                }
+                return typeof(string);
+            }
+            set {
+                ViewState["DataType"] = value;
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Gets or sets whether the field is visible in Insert mode.  Turn off for auto-gen'd db fields</para>
+        /// </devdoc>
+        public override bool InsertVisible {
+            get {
+                return base.InsertVisible;
+            }
+            set {
+                if (!_suppressPropertyThrows) {
+                    throw new NotSupportedException();
+                }
+            }
+        }
+    
+        
+
+        /// <devdoc>
+        /// <para>Gets or sets the property that determines whether the BoundField treats empty string as
+        /// null when the field values are extracted.</para>
+        /// </devdoc>
+        public override bool ConvertEmptyStringToNull {
+            get {
+                return base.ConvertEmptyStringToNull;
+            }
+            set {
+                if (!_suppressPropertyThrows) {
+                    throw new NotSupportedException();
+                }
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>Determines whether the field should display a text box.</para>
+        /// </devdoc>
+        private bool UseCheckBox {
+            get {
+                if (!_useCheckBoxValid) {
+                    _useCheckBox = (DataType == typeof(bool) || DataType == typeof(bool?));
+                    _useCheckBoxValid = true;
+                }
+                return _useCheckBox;
+            }
+        }
+
+        protected override void CopyProperties(DataControlField newField) {
+            ((AutoGeneratedField)newField).DataType = DataType;
+            _suppressPropertyThrows = true;
+            ((AutoGeneratedField)newField)._suppressPropertyThrows = true;
+            base.CopyProperties(newField);
+            _suppressPropertyThrows = false;
+            ((AutoGeneratedField)newField)._suppressPropertyThrows = false;
+        }
+
+        protected override DataControlField CreateField() {
+            return new AutoGeneratedField(DataField);
+        }
+
+
+        /// <devdoc>
+        /// Returns a value to be used for design-time rendering
+        /// </devdoc>
+        protected override object GetDesignTimeValue() {
+            if (UseCheckBox) {
+                return true;
+            }
+            return base.GetDesignTimeValue();
+        }
+        
+
+        /// <devdoc>
+        /// Extracts the value of the databound cell and inserts the value into the given dictionary
+        /// </devdoc>
+        public override void ExtractValuesFromCell(IOrderedDictionary dictionary, DataControlFieldCell cell, DataControlRowState rowState, bool includeReadOnly) {
+            if (UseCheckBox) {
+                Control childControl = null;
+                string dataField = DataField;
+                object value = null;
+    
+                if (cell.Controls.Count > 0) {
+                    childControl = cell.Controls[0];
+    
+                    CheckBox checkBox = childControl as CheckBox;
+                    if (checkBox != null) {
+                        if (includeReadOnly || checkBox.Enabled) {
+                            value = checkBox.Checked;
+                        }
+                    }
+                }
+    
+                if (value != null) {
+                    if (dictionary.Contains(dataField)) {
+                        dictionary[dataField] = value;
+                    }
+                    else {
+                        dictionary.Add(dataField, value);
+                    }
+                }
+            }
+            else {
+                base.ExtractValuesFromCell(dictionary, cell, rowState, includeReadOnly);
+            }
+            
+
+        }
+
+
+        protected override void InitializeDataCell(DataControlFieldCell cell, DataControlRowState rowState) {
+            if (UseCheckBox) {
+                CheckBox childControl = null;
+                CheckBox boundControl = null;
+                
+                if (((rowState & DataControlRowState.Edit) != 0 && ReadOnly == false) || (rowState & DataControlRowState.Insert) != 0) {
+                    CheckBox editor = new CheckBox();
+                    childControl = editor;
+    
+                    if (DataField.Length != 0 && (rowState & DataControlRowState.Edit) != 0) {
+                        boundControl = editor;
+                    }
+                }
+                else if (DataField.Length != 0) {
+                    CheckBox editor = new CheckBox();
+                    editor.Enabled = false;
+                    childControl = editor;
+                    boundControl = editor;
+                }
+                
+                if (childControl != null) {
+                    childControl.ToolTip = HeaderText;
+                    cell.Controls.Add(childControl);
+                }
+                
+                if (boundControl != null) {
+                    boundControl.DataBinding += new EventHandler(this.OnDataBindField);
+                }
+            }
+            else {
+                base.InitializeDataCell(cell, rowState);
+            }
+        }
+
+
+        /// <devdoc>
+        /// </devdoc>
+        protected override void OnDataBindField(object sender, EventArgs e) {
+            if (UseCheckBox) {
+                Control boundControl = (Control)sender;
+                Control controlContainer = boundControl.NamingContainer;
+    
+    
+                object data = GetValue(controlContainer);
+     
+                if (!(boundControl is CheckBox)) {
+                    throw new HttpException(SR.GetString(SR.CheckBoxField_WrongControlType, DataField));
+                }
+                if (DataBinder.IsNull(data)) {
+                    ((CheckBox)boundControl).Checked = false;
+                }
+                else {
+                    if (data is Boolean) {
+                        ((CheckBox)boundControl).Checked = (Boolean)data;
+                    }
+                    else {
+                        try {
+                            ((CheckBox)boundControl).Checked = Boolean.Parse(data.ToString());
+                        }
+                        catch (FormatException fe) {
+                            throw new HttpException(SR.GetString(SR.CheckBoxField_CouldntParseAsBoolean, DataField), fe);
+                        }
+                    }                
+                }
+            }
+            else {
+                base.OnDataBindField(sender, e);
+            }
+        }
+
+        /// <devdoc>
+        /// <para>Override with an empty body if the field's controls all support callback.
+        ///  Otherwise, override and throw a useful error message about why the field can't support callbacks.</para>
+        /// </devdoc>
+        public override void ValidateSupportsCallback() {
+        }
+    }
+}
+