mcs/class/System.Web/System.Web.UI.WebControls/DataControlButton.cs

   1 //
   2 // System.Web.UI.WebControls.DataControlButton.cs
   3 //
   4 // Authors:
   5 //      Lluis Sanchez Gual (lluis@novell.com)
   6 //
   7 // (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System;
  32 using System.Web;
  33 using System.Web.UI;
  34 using System.ComponentModel;
  35 using System.ComponentModel.Design;
  36 using System.Drawing;
  37
  38 namespace System.Web.UI.WebControls
  39 {
  40         internal class DataControlButton: Button
  41         {
  42                 Control container;
  43
  44                 public DataControlButton (Control container)
  45                 {
  46                         this.container = container;
  47                         CausesValidation = false;
  48                 }
  49
  50                 public DataControlButton (Control container, string text, string image, string command, string commandArg, bool allowCallback)
  51                         : this (container)
  52                 {
  53                         Text = text;
  54                         ImageUrl = image;
  55                         CommandName = command;
  56                         CommandArgument = commandArg;
  57                         AllowCallback = allowCallback;
  58                 }
  59
  60                 public Control Container {
  61                         get { return container; }
  62                         set { container = value; }
  63                 }
  64
  65                 public string ImageUrl {
  66                         get {
  67                                 object o = ViewState["iu"];
  68                                 if (o != null) return (string) o;
  69                                 return String.Empty;
  70                         }
  71                         set {
  72                                 ViewState["iu"] = value;
  73                         }
  74                 }
  75
  76                 public bool AllowCallback {
  77                         get {
  78                                 object o = ViewState["ac"];
  79                                 if (o != null) return (bool) o;
  80                                 return true;
  81                         }
  82                         set {
  83                                 ViewState["ac"] = value;
  84                         }
  85                 }
  86
  87                 public virtual ButtonType ButtonType {
  88                         get {
  89                                 object ob = ViewState ["ButtonType"];
  90                                 if (ob != null) return (ButtonType) ob;
  91                                 return ButtonType.Link;
  92                         }
  93                         set {
  94                                 ViewState ["ButtonType"] = value;
  95                         }
  96                 }
  97
  98                 protected internal override void Render (HtmlTextWriter writer)
  99                 {
 100                         if (CommandName.Length > 0 && ButtonType == ButtonType.Link) {
 101                                 EnsureForeColor ();
 102                         }
 103
 104                         if (CommandName.Length > 0 || CommandArgument.Length > 0 || ButtonType == ButtonType.Button)
 105                         {
 106                                 string postScript = null;
 107                                 string callScript = null;
 108                                 PostBackOptions ops = null;
 109
 110                                 IPostBackContainer pcner = container as IPostBackContainer;
 111                                 if (pcner != null) {
 112                                         ops = pcner.GetPostBackOptions (this);
 113                                         ops.RequiresJavaScriptProtocol = ButtonType == ButtonType.Link;
 114                                 }
 115                                 else
 116                                         ops = GetPostBackOptions ();
 117
 118                                 postScript = Page.ClientScript.GetPostBackEventReference (ops, !Page.IsCallback);
 119
 120                                 if (AllowCallback) {
 121                                         ICallbackContainer ccner = container as ICallbackContainer;
 122                                         if (ccner != null)
 123                                                 callScript = ccner.GetCallbackScript (this, CommandName + "$" + CommandArgument);
 124                                 }
 125
 126                                 ControlStyle.AddAttributesToRender (writer);
 127
 128                                 if (ButtonType == ButtonType.Image) {
 129                                         writer.AddAttribute (HtmlTextWriterAttribute.Type, "image");
 130                                         writer.AddAttribute (HtmlTextWriterAttribute.Src, ResolveClientUrl (ImageUrl));
 131                                         if (callScript != null)
 132                                                 writer.AddAttribute (HtmlTextWriterAttribute.Onclick, callScript);
 133                                         else
 134                                                 writer.AddAttribute (HtmlTextWriterAttribute.Onclick, postScript);
 135                                         if (Text.Length > 0)
 136                                                 writer.AddAttribute (HtmlTextWriterAttribute.Alt, Text);
 137                                         writer.AddStyleAttribute (HtmlTextWriterStyle.BorderWidth, "0px");
 138                                         writer.RenderBeginTag (HtmlTextWriterTag.Input);
 139                                         writer.RenderEndTag ();
 140                                 }
 141                                 if (ButtonType == ButtonType.Link) {
 142                                         if (callScript != null) {
 143                                                 writer.AddAttribute (HtmlTextWriterAttribute.Onclick, callScript);
 144                                         }
 145                                         writer.AddAttribute (HtmlTextWriterAttribute.Href, postScript);
 146                                         writer.RenderBeginTag (HtmlTextWriterTag.A);
 147                                         writer.Write (Text);
 148                                         writer.RenderEndTag ();
 149                                 }
 150                                 if (ButtonType == ButtonType.Button) {
 151                                         if (callScript != null)
 152                                                 writer.AddAttribute (HtmlTextWriterAttribute.Onclick, callScript);
 153                                         else
 154                                                 writer.AddAttribute (HtmlTextWriterAttribute.Onclick, postScript);
 155
 156                                         writer.AddAttribute (HtmlTextWriterAttribute.Type, "button");
 157                                         writer.AddAttribute (HtmlTextWriterAttribute.Name, ClientID);
 158                                         writer.AddAttribute (HtmlTextWriterAttribute.Value, Text);
 159                                         writer.RenderBeginTag (HtmlTextWriterTag.Input);
 160                                         writer.RenderEndTag ();
 161                                 }
 162                         }
 163                         else {
 164                                 if (ImageUrl.Length > 0) {
 165                                         ControlStyle.AddAttributesToRender (writer);
 166                                         writer.AddAttribute (HtmlTextWriterAttribute.Src, ResolveClientUrl (ImageUrl));
 167                                         if (Text.Length > 0)
 168                                                 writer.AddAttribute (HtmlTextWriterAttribute.Alt, Text);
 169                                         writer.AddStyleAttribute (HtmlTextWriterStyle.BorderWidth, "0px");
 170                                         writer.RenderBeginTag (HtmlTextWriterTag.Img);
 171                                         writer.RenderEndTag ();
 172                                 }
 173                                 else {
 174                                         if (!ControlStyle.IsEmpty) {
 175                                                 ControlStyle.AddAttributesToRender (writer);
 176                                         }
 177                                         writer.RenderBeginTag (HtmlTextWriterTag.Span);
 178                                         writer.Write (Text);
 179                                         writer.RenderEndTag ();
 180                                 }
 181                         }
 182                 }
 183
 184                 protected override PostBackOptions GetPostBackOptions () {
 185                         PostBackOptions options = new PostBackOptions (this);
 186                         options.Argument = "";
 187                         options.RequiresJavaScriptProtocol = ButtonType == ButtonType.Link;
 188                         options.ClientSubmit = true;
 189                         options.PerformValidation = CausesValidation && Page != null && Page.AreValidatorsUplevel (ValidationGroup);
 190                         if (options.PerformValidation)
 191                                 options.ValidationGroup = ValidationGroup;
 192
 193                         return options;
 194                 }
 195
 196                 private void EnsureForeColor () {
 197                         if (ForeColor != Color.Empty)
 198                                 return;
 199
 200                         for (Control parent = Parent; parent != null; parent = parent.Parent) {
 201                                 WebControl wc = parent as WebControl;
 202                                 if (wc != null && wc.ForeColor != Color.Empty) {
 203                                         ForeColor = wc.ForeColor;
 204                                         break;
 205                                 }
 206                                 if (parent == container)
 207                                         break;
 208                         }
 209                 }
 210         }
 211 }
 212
 213 #endif