Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Adapters / WmlSelectionListAdapter.cs / 1305376 / WmlSelectionListAdapter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.Globalization; using System.IO; using System.Web; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.MobileControls; using System.Collections.Specialized; using System.Text.RegularExpressions; using System.Collections; using System.Text; using System.Diagnostics; using System.Security.Permissions; #if COMPILING_FOR_SHIPPED_SOURCE namespace System.Web.UI.MobileControls.ShippedAdapterSource #else namespace System.Web.UI.MobileControls.Adapters #endif { /* * WmlSelectionListAdapter provides the wml device functionality for SelectionList controls. * * Copyright (c) 2000 Microsoft Corporation */ ///[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")] public class WmlSelectionListAdapter : WmlControlAdapter { private String _ivalue = null; private const String ClientPrefix = "__slst_"; /// protected new SelectionList Control { get { return (SelectionList)base.Control; } } /// public override void OnInit(EventArgs e) { } /// public override void OnPreRender(EventArgs e) { int firstSelectedIndex; MobileListItemCollection items = Control.Items; int count = items.Count; for(firstSelectedIndex = 0; firstSelectedIndex < count; firstSelectedIndex++) { if(items[firstSelectedIndex].Selected) { break; } } if(firstSelectedIndex < count) { StringBuilder ivalue=new StringBuilder(); ivalue.Append((firstSelectedIndex + 1).ToString(CultureInfo.InvariantCulture)); if(Control.IsMultiSelect) { for(int i = firstSelectedIndex + 1; i < count; i++) { if(items[i].Selected) { ivalue.Append(";"); ivalue.Append((i + 1).ToString(CultureInfo.InvariantCulture)); } } } _ivalue = ivalue.ToString(); } else { String defaultValue = null; if (!Control.IsMultiSelect) { // 1 is the first index of a single selection list defaultValue = "1"; } else if (Device.CanRenderSetvarZeroWithMultiSelectionList) { // 0 means no items have been selected, for MultiSelect case defaultValue = "0"; } if (defaultValue != null) { _ivalue = defaultValue; } } } /// public override void Render(WmlMobileTextWriter writer) { MobileListItemCollection items = Control.Items; int count = items.Count; if (count == 0) { return; } writer.EnterLayout(Style); bool crossPagePost = !String.IsNullOrEmpty(Control.Form.Action); if (crossPagePost) { if (_ivalue != null) { String formVariable = ClientPrefix + Control.ClientID; writer.AddFormVariable (formVariable, _ivalue, false); // does not render _ivalue if null or form variables written. writer.RenderBeginSelect(Control.ClientID, formVariable, _ivalue, Control.Title, Control.IsMultiSelect); } else // _ivalue == null { writer.RenderBeginSelect(Control.ClientID, null, null, Control.Title, Control.IsMultiSelect); } } else // !crossPagePost { if (_ivalue != null) { writer.AddFormVariable (Control.ClientID, _ivalue, false); } // does not render _ivalue if null or form variables written. writer.RenderBeginSelect(null, Control.ClientID, _ivalue, Control.Title, Control.IsMultiSelect); } foreach (MobileListItem item in items) { if (crossPagePost) { writer.RenderSelectOption(item.Text, item.Value); } else { writer.RenderSelectOption(item.Text); } } writer.RenderEndSelect(Control.BreakAfter); writer.ExitLayout(Style); } // Parse the WML posted data appropriately. /// public override bool LoadPostData(String key, NameValueCollection data, Object controlPrivateData, out bool dataChanged) { int[] selectedItemIndices; String[] selectedItems = data.GetValues(key); Debug.Assert (String.IsNullOrEmpty(Control.Form.Action), "Cross page post (!IsPostBack) assumed when Form.Action nonempty." + "LoadPostData should not have been be called."); // Note: controlPrivateData is selectedIndices from viewstate. int[] originalSelectedIndices = (int[])controlPrivateData; dataChanged = false; if (selectedItems == null) { // This shouldn't happen if we're posting back from the form that // contains the selection list. It could happen when being called // as the result of a postback from another form on the page, // so we just return quietly. return true; } if (Control.Items.Count == 0) { return true; } // If singleselect && nothing was selected, select // first elt. (Non-mobile DropDown does same by getting SelectedIndex). if(!Control.IsMultiSelect && originalSelectedIndices.Length == 0 && Control.Items.Count > 0) { Control.Items[0].Selected = true; originalSelectedIndices = new int[]{0}; } // Case where nothing is selected. if(selectedItems == null || (selectedItems.Length == 1 && (selectedItems[0] != null && selectedItems[0].Length == 0)) || (selectedItems.Length == 1 && selectedItems[0] == "0")) // non-selected MultiSelect case { selectedItems = new String[]{}; } // WML multiselect case with more than one selection. if(selectedItems.Length == 1 && selectedItems[0].IndexOf(';') > -1) { String selected = selectedItems[0]; // Eliminate trailing semicolon, if there is one. selected = Regex.Replace(selected, ";$", ""); selectedItems = Regex.Split(selected, ";"); } selectedItemIndices = new int[selectedItems.Length]; for(int i = 0; i < selectedItems.Length; i++) { // WML iname gives index + 1, so subtract one back out. selectedItemIndices[i] = Int32.Parse(selectedItems[i], CultureInfo.InvariantCulture) - 1; } // Do not assume posted selected indices are ascending. // We do know originalSelectedIndices are ascending. Array.Sort(selectedItemIndices); // Check whether selections have changed. if(selectedItemIndices.Length != originalSelectedIndices.Length) { dataChanged = true; } else { for(int i = 0; i < selectedItemIndices.Length; i++) { if(selectedItemIndices[i] != originalSelectedIndices[i]) { dataChanged = true; } } } for (int i = 0; i < Control.Items.Count; i++) { Control.Items[i].Selected = false; } for(int i = 0; i < selectedItemIndices.Length; i++) { Control.Items[selectedItemIndices[i]].Selected = true; } return true; } /// protected override String GetPostBackValue() { // Optimization - if viewstate is enabled for this control, and the // postback returns to this page, we just let it do the trick. if (Control.Form.Action.Length > 0 || !IsViewStateEnabled()) { return _ivalue != null ? _ivalue : String.Empty; } else { return null; } } private bool IsViewStateEnabled() { Control ctl = Control; while (ctl != null) { if (!ctl.EnableViewState) { return false; } ctl = ctl.Parent; } return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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