1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Drawing.Design;
  5 using System.Text;
  6 using System.Web;
  7 using System.Web.UI;
  8 using System.Web.UI.WebControls;
  9 
 10 
 11 namespace ClickButton
 12 {
 13     [DefaultProperty("ClickText")]
 14     [ToolboxData("<{0}:exOneClickButton runat=server></{0}:exOneClickButton>")]
 15     public class exOneClickButton : System.Web.UI.WebControls.Button
 16     {
 17         
 18         #region ClickText - Текст, отображаемый на кнопке  после  нажатия
 19 
 20         private string _clickText;
 21 
 22         /// <summary>
 23         /// Текст, отображаемый на кнопке  после  нажатия
 24         /// </summary>
 25         [DefaultValue("Идет обработка !")]
 26         [Description("Текст, отображаемый на кнопке  после  нажатия")]
 27 
 28         public string ClickText
 29         {
 30             get { return _clickText; }
 31             set { _clickText = value; }
 32         }
 33 
 34         #endregion
 35 
 36         #region IsClicked - Сохраняет факт  нажатия на кнопку
 37 
 38         private bool _isClicked;
 39 
 40         /// <summary>
 41         /// Сохраняет факт  нажатия на кнопку 
 42         /// </summary>
 43         [DefaultValue(false)]
 44         [Description("Сохраняет факт  нажатия на кнопку ")]
 45         [Browsable(false)]
 46         private bool IsClicked
 47         {
 48             get { return _isClicked; }
 49             set { _isClicked = value; }
 50         }
 51 
 52         #endregion
 53         
 54         #region Src - источник для адреса картинки
 55 
 56         private string _src;
 57 
 58 
 59         /// <summary>
 60         /// Источник для картинки при графическом стиле отображения 
 61         /// </summary>
 62         [Browsable(true), Bindable(true),
 63         Description("Источник для картинки при графическом стиле отображения")]
 64         [DefaultValue(false)]
 65         [NotifyParentProperty(true)]
 66         [Category("Control style")]
 67         [EditorAttribute(typeof(System.Web.UI.Design.UrlEditor), typeof(UITypeEditor))]
 68         public string Src
 69         {
 70             get { return _src; }
 71             set { _src = value; }
 72         }
 73 
 74         #endregion
 75 
 76         #region Стиль отображения компоненты
 77 
 78         private ButtonType _buttonStyle;
 79 
 80         /// <summary>
 81         /// Стиль отображения компоненты 
 82         /// </summary>
 83         [Browsable(true),  Bindable(false)]
 84         [Description("Стиль отображения компоненты ")]
 85         [DefaultValue(ButtonType.Button)]
 86         [NotifyParentProperty(true)]
 87         [Category("Control style")]
 88         public ButtonType ButtonStyle
 89         {
 90             get { return _buttonStyle; }
 91             set { _buttonStyle = value; }
 92         }
 93 
 94         #endregion
 95 
 96 
 97         #region Перекрытые методы
 98 
 99         protected override void Render(HtmlTextWriter writer)
100         {
101          
102             
103             switch(ButtonStyle)
104             {
105                 case ButtonType.Button:
106                     base.Render(writer);
107                     break;
108                 case ButtonType.Link:
109                     writer.AddAttribute(HtmlTextWriterAttribute.Href, "#");
110                     if (this.CssClass != "")
111                         writer.AddAttribute(HtmlTextWriterAttribute.Class, this.CssClass);
112 
113                     if (!base.Enabled || IsClicked)
114                         writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "true");
115                     
116                     writer.AddAttribute(HtmlTextWriterAttribute.Onclick, this.OnClientClick);
117                     
118                     writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
119                     writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
120 
121                     if (this.ToolTip.Length > 0)
122                         writer.AddAttribute(HtmlTextWriterAttribute.Title, this.ToolTip);
123 
124                     writer.RenderBeginTag(HtmlTextWriterTag.A);
125                     writer.Write(this.Text);
126                     writer.RenderEndTag( );
127                     break;
128                 case ButtonType.Image:
129                     writer.AddAttribute(HtmlTextWriterAttribute.Type, "Image");
130                     writer.AddAttribute(HtmlTextWriterAttribute.Alt, this.Text);
131                     writer.AddAttribute(HtmlTextWriterAttribute.Src, GetSrcOnSite());
132 
133                     
134                     if (this.CssClass != "")
135                         writer.AddAttribute(HtmlTextWriterAttribute.Class, this.CssClass);
136 
137                     if (!base.Enabled || IsClicked)
138                         writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "true");
139                     
140                     writer.AddAttribute(HtmlTextWriterAttribute.Onclick, this.OnClientClick );
141 
142 
143                     writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
144                     writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
145 
146                     if (this.ToolTip.Length > 0)
147                         writer.AddAttribute(HtmlTextWriterAttribute.Title, this.ToolTip);
148 
149 
150                     writer.RenderBeginTag(HtmlTextWriterTag.Input);
151 
152                     writer.RenderEndTag( );
153                     break;
154             }
155             
156         }
157 
158         private string GetSrcOnSite()
159         {
160             if (!this.DesignMode)
161                 return (!this.Src.StartsWith("~/")) ?
162                        this.Src : this.Src.Replace("~", this.Page.Request.ApplicationPath);
163             else
164                 return _src;
165             
166             
167         }
168 
169         /// <param name="savedState">An object that represents the control state to restore.</param>
170         protected override void LoadViewState(object savedState)
171         {
172             if (savedState != null)
173             {
174                 object[] state;
175                 state = savedState as object[];
176                 if (state[0] != null)
177                     base.LoadViewState(state[0]);
178                 if (state[1] != null)
179                     ButtonStyle = (ButtonType)state[1];
180                 if (state[2] != null)
181                     Src = (string)state[2];
182                 if (state[3] != null)
183                     IsClicked = (bool)state[3];
184                 if (state[4] != null)
185                     ClickText  = (string)state[4];
186             }
187 
188         }
189 
190         /// <returns>An object that contains the current view state of the control; otherwise, if there is no view state associated with the control, null.</returns>
191         protected override object SaveViewState()
192         {
193             object[] state;
194             state = new object[5];
195             state[0] = base.SaveViewState( );
196             state[1] = ButtonStyle;
197             state[2] = Src;
198             state[3] = IsClicked;
199             state[4] = ClickText;
200             return state; 
201         }
202 
203         protected override void OnPreRender(System.EventArgs e)
204         {
205             base.OnPreRender(e);
206 
207             if (!IsClicked)
208             {
209 
210 
211                 string strClickedText = string.Empty;
212 
213                 if (string.Empty.Equals(ClickText))
214                     strClickedText = string.Empty;
215                 else
216                     switch (ButtonStyle)
217                     {
218                         case ButtonType.Button:
219                             strClickedText = " window.event.srcElement.value='" + ClickText + @"';";
220                             break;
221                         case ButtonType.Link:
222                             strClickedText = " window.event.srcElement.innerText='" + ClickText + @"';";
223                             break;
224                         case ButtonType.Image:
225                             strClickedText = " window.event.srcElement.alt='" + ClickText + @"';";
226                             break;
227                     }
228 
229                 OnClientClick = "javascript:";
230                 if (CausesValidation)
231                 {
232                     OnClientClick += "if (typeof(Page_ClientValidate) == 'function')"
233                                      + "{"
234                                      + "   var PageClientValid = Page_ClientValidate();"
235                                      + "   if (!PageClientValid) return false;"
236                                      + "}";
237                 }
238                 OnClientClick += "window.event.srcElement.disabled=true;"
239                                  + strClickedText
240                                  + Page.ClientScript.GetPostBackEventReference(new PostBackOptions(this))
241                                  + " ; if (window.external!=null  && window.external.AutoCompleteSaveForm!=null) "
242                                  + " window.external.AutoCompleteSaveForm(document.forms[0].id);"
243                                  + "  return true;";
244 
245 
246             }
247             else
248             {
249                 switch (ButtonStyle)
250                 {
251                     case ButtonType.Button:
252                         Attributes.Add("disabled", "true");
253                         break;
254                     case ButtonType.Link:
255                     case ButtonType.Image:
256                         OnClientClick = "javascript:return false;";
257                         break;
258                 }
259 
260             }
261         }
262 
263         protected override void OnClick(System.EventArgs e)
264         {
265             base.OnClick(e);
266             IsClicked = true;
267         }
268 
269 
270         #endregion
271 
272 
273         public exOneClickButton() : base ()
274         {
275             ButtonStyle = ButtonType.Button;
276             _isClicked = false;
277             _clickText = "Идет обработка !";
278         }
279 
280         
281     }
282    
283 
284 
285 }
286