防止重复提交代码,Asp.Net代码库,德仔网

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【Asp.Net】防止重复提交
作者:Dezai.CN / 发布于2011/3/15/ 839
编译成类库使用
<div><span style="color: #0000ff">using</span><span style="color: #000000"> System;
</span><span style="color: #0000ff">using</span><span style="color: #000000"> System.Collections.Generic;
</span><span style="color: #0000ff">using</span><span style="color: #000000"> System.ComponentModel;
</span><span style="color: #0000ff">using</span><span style="color: #000000"> System.Text;
</span><span style="color: #0000ff">using</span><span style="color: #000000"> System.Web;
</span><span style="color: #0000ff">using</span><span style="color: #000000"> System.Web.UI;
</span><span style="color: #0000ff">using</span><span style="color: #000000"> System.Web.UI.WebControls;

</span><span style="color: #0000ff">namespace</span><span style="color: #000000"> BlogLan.Web.Controls
{
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"><summary></span><span style="color: #008000">
 </span><span style="color: #808080">///</span><span style="color: #008000"> 表示一个防止重复提交的按钮。当用户单击按钮以后，该按钮变灰，不能再次单击，直到重新加载页面或者跳转。
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"></summary></span><span style="color: #808080">
</span><span style="color: #000000"> [DefaultProperty(</span><span style="color: #800000">"</span><span style="color: #800000">Text</span><span style="color: #800000">"</span><span style="color: #000000">)]
 [ToolboxData(</span><span style="color: #800000">"</span><span style="color: #800000"><{0}:ClickOnceButton runat=server></{0}:ClickOnceButton></span><span style="color: #800000">"</span><span style="color: #000000">)]
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">class</span><span style="color: #000000"> ClickOnceButton : System.Web.UI.WebControls.Button
 {
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"><summary></span><span style="color: #008000">
 </span><span style="color: #808080">///</span><span style="color: #008000"> 默认的构造函数。
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"></summary></span><span style="color: #808080">
</span><span style="color: #000000"> </span><span style="color: #0000ff">public</span><span style="color: #000000"> ClickOnceButton()
 {
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">afterSubmitText</span><span style="color: #800000">"</span><span style="color: #000000">] </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800000">"</span><span style="color: #800000">正在提交，请稍候...</span><span style="color: #800000">"</span><span style="color: #000000">;
 </span><span style="color: #0000ff">base</span><span style="color: #000000">.Text </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800000">"</span><span style="color: #800000">ClickOnceButton</span><span style="color: #800000">"</span><span style="color: #000000">;
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">showMessageBox</span><span style="color: #800000">"</span><span style="color: #000000">] </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">;
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">warningText</span><span style="color: #800000">"</span><span style="color: #000000">] </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800000">"</span><span style="color: #800000">确定要提交吗？</span><span style="color: #800000">"</span><span style="color: #000000">;
 }

 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"><summary></span><span style="color: #008000">
 </span><span style="color: #808080">///</span><span style="color: #008000"> 获取或设置单击按钮后，按钮上所显示的文本。
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"></summary></span><span style="color: #808080">
</span><span style="color: #000000"> [Bindable(</span><span style="color: #0000ff">true</span><span style="color: #000000">),
 Category(</span><span style="color: #800000">"</span><span style="color: #800000">Appearance</span><span style="color: #800000">"</span><span style="color: #000000">),
 DefaultValue(</span><span style="color: #800000">"</span><span style="color: #800000">正在提交，请稍候...</span><span style="color: #800000">"</span><span style="color: #000000">),
 Description(</span><span style="color: #800000">"</span><span style="color: #800000">指示单击提交后，按钮上所显示的文本。</span><span style="color: #800000">"</span><span style="color: #000000">)]
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">string</span><span style="color: #000000"> AfterSubmitText
 {
 </span><span style="color: #0000ff">get</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">string</span><span style="color: #000000"> afterSubmitText </span><span style="color: #000000">=</span><span style="color: #000000"> (</span><span style="color: #0000ff">string</span><span style="color: #000000">)</span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">afterSubmitText</span><span style="color: #800000">"</span><span style="color: #000000">];
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (afterSubmitText </span><span style="color: #000000">!=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">)
 {
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> afterSubmitText;
 }
 </span><span style="color: #0000ff">else</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">string</span><span style="color: #000000">.Empty;
 }
 }
 </span><span style="color: #0000ff">set</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">afterSubmitText</span><span style="color: #800000">"</span><span style="color: #000000">] </span><span style="color: #000000">=</span><span style="color: #000000"> value;
 }
 }

 [Bindable(</span><span style="color: #0000ff">true</span><span style="color: #000000">),
 Category(</span><span style="color: #800000">"</span><span style="color: #800000">Appearance</span><span style="color: #800000">"</span><span style="color: #000000">),
 DefaultValue(</span><span style="color: #0000ff">false</span><span style="color: #000000">),
 Description(</span><span style="color: #800000">"</span><span style="color: #800000">指示是否要显示一个提示框。</span><span style="color: #800000">"</span><span style="color: #000000">)]
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">bool</span><span style="color: #000000"> ShowMessageBox
 {
 </span><span style="color: #0000ff">get</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> (</span><span style="color: #0000ff">bool</span><span style="color: #000000">)</span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">showMessageBox</span><span style="color: #800000">"</span><span style="color: #000000">];
 }
 </span><span style="color: #0000ff">set</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">showMessageBox</span><span style="color: #800000">"</span><span style="color: #000000">] </span><span style="color: #000000">=</span><span style="color: #000000"> value;
 }
 }


 [Bindable(</span><span style="color: #0000ff">true</span><span style="color: #000000">),
 Category(</span><span style="color: #800000">"</span><span style="color: #800000">Appearance</span><span style="color: #800000">"</span><span style="color: #000000">),
 DefaultValue(</span><span style="color: #800000">"</span><span style="color: #800000">确定要提交吗？</span><span style="color: #800000">"</span><span style="color: #000000">),
 Description(</span><span style="color: #800000">"</span><span style="color: #800000">指示提示框内所包含的内容。</span><span style="color: #800000">"</span><span style="color: #000000">)]
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">string</span><span style="color: #000000"> WarningText
 



; {
 </span><span style="color: #0000ff">get</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> (</span><span style="color: #0000ff">string</span><span style="color: #000000">)</span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">warningText</span><span style="color: #800000">"</span><span style="color: #000000">];
 }
 </span><span style="color: #0000ff">set</span><span style="color: #000000">
 {
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">warningText</span><span style="color: #800000">"</span><span style="color: #000000">] </span><span style="color: #000000">=</span><span style="color: #000000"> value;
 }
 }

 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"><summary></span><span style="color: #008000">
 </span><span style="color: #808080">///</span><span style="color: #008000"> AddAttributesToRender
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"></summary></span><span style="color: #008000">
 </span><span style="color: #808080">///</span><span style="color: #008000"> </span><span style="color: #808080"><param name="writer"></span><span style="color: #008000">HtmlTextWriter</span><span style="color: #808080"></param></span><span style="color: #808080">
</span><span style="color: #000000"> </span><span style="color: #0000ff">protected</span><span style="color: #000000"> </span><span style="color: #0000ff">override</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> AddAttributesToRender(HtmlTextWriter writer)
 {
 System.Text.StringBuilder ClientSideEventReference </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> System.Text.StringBuilder();

 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (((</span><span style="color: #0000ff">this</span><span style="color: #000000">.Page </span><span style="color: #000000">!=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">) </span><span style="color: #000000">&&</span><span style="color: #000000"> </span><span style="color: #0000ff">this</span><span style="color: #000000">.CausesValidation) </span><span style="color: #000000">&&</span><span style="color: #000000"> (</span><span style="color: #0000ff">this</span><span style="color: #000000">.Page.Validators.Count </span><span style="color: #000000">></span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">))
 {
 ClientSideEventReference.Append(</span><span style="color: #800000">"</span><span style="color: #800000">if (typeof(Page_ClientValidate) == 'function'){if (Page_ClientValidate() == false){return false;}}</span><span style="color: #800000">"</span><span style="color: #000000">);
 }
 </span><span style="color: #008000">//</span><span style="color: #008000">ShowMessageBox?</span><span style="color: #008000">
</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #0000ff">this</span><span style="color: #000000">.ShowMessageBox)
 {
 ClientSideEventReference.Append(</span><span style="color: #800000">"</span><span style="color: #800000">if (!confirm('</span><span style="color: #800000">"</span><span style="color: #000000"> </span><span style="color: #000000">+</span><span style="color: #000000"> </span><span style="color: #0000ff">this</span><span style="color: #000000">.WarningText </span><span style="color: #000000">+</span><span style="color: #000000"> </span><span style="color: #800000">"</span><span style="color: #800000">')){return false}</span><span style="color: #800000">"</span><span style="color: #000000">);
 }
 ClientSideEventReference.AppendFormat(</span><span style="color: #800000">"</span><span style="color: #800000">this.value = '{0}';</span><span style="color: #800000">"</span><span style="color: #000000">, (</span><span style="color: #0000ff">string</span><span style="color: #000000">)</span><span style="color: #0000ff">this</span><span style="color: #000000">.ViewState[</span><span style="color: #800000">"</span><span style="color: #800000">afterSubmitText</span><span style="color: #800000">"</span><span style="color: #000000">]);
 ClientSideEventReference.Append(</span><span style="color: #800000">"</span><span style="color: #800000">this.disabled = true;</span><span style="color: #800000">"</span><span style="color: #000000">);
 ClientSideEventReference.Append(</span><span style="color: #0000ff">this</span><span style="color: #000000">.Page.ClientScript.GetPostBackEventReference(</span><span style="color: #0000ff">this</span><span style="color: #000000">, </span><span style="color: #0000ff">string</span><span style="color: #000000">.Empty));


 writer.AddAttribute(HtmlTextWriterAttribute.Onclick, ClientSideEventReference.ToString(), </span><span style="color: #0000ff">true</span><span style="color: #000000">);
 </span><span style="color: #0000ff">base</span><span style="color: #000000">.AddAttributesToRender(writer);
 }
 }
}
</span></div>
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