AttributeCollection.Remove(String) 方法

定义

从服务器控件的 AttributeCollection 对象中移除一个特性。

public:
 void Remove(System::String ^ key);
public void Remove (string key);
member this.Remove : string -> unit
Public Sub Remove (key As String)

参数

key
String

要移除的属性的名称。

示例

以下示例演示如何以编程方式从 HTML 服务器控件 AttributeCollection 的对象中删除属性。

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
 
    protected void SubmitBtn_Click(object sender, EventArgs e)
    {
        FirstSelect.Attributes.Remove("Size");
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>AttributeCollection Example</title>
</head>

 <body>
    <form id="form1" runat="server">
    <div>
    Make a selection:
    <select id="FirstSelect"
            size="10"
            runat="server">
       <option>This</option>
       <option>That</option>
       <option>Other</option>
    </select>
    <br/><br/>

    <input type="submit" 
           id="SubmitBtn"
           value="Remove Size Attribute" 
           onserverclick="SubmitBtn_Click" 
           runat="server"/>
    </div>
 </form>
 </body>
 </html>
<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
 
    Protected Sub SubmitBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        FirstSelect.Attributes.Remove("Size")
    End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>AttributeCollection Example</title>
</head>

 <body>
    <form id="form1" runat="server">
    <div>
    Make a selection:
    <select id="FirstSelect"
            size="10"
            runat="server">
       <option>This</option>
       <option>That</option>
       <option>Other</option>
    </select>
    <br/><br/>

    <input type="submit" 
           id="SubmitBtn"
           value="Remove Size Attribute" 
           onserverclick="SubmitBtn_Click" 
           runat="server"/>
    </div>
 </form>
 </body>
 </html>

注解

AttributeCollection如果对象不包含具有指定key属性,则集合保持不变。 不会引发异常。

适用于

另请参阅