ParameterCollection.Remove(Parameter) 方法
定义
重要
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从 Parameter 集合中移除指定的 ParameterCollection 对象。
public:
void Remove(System::Web::UI::WebControls::Parameter ^ parameter);public void Remove (System.Web.UI.WebControls.Parameter parameter);member this.Remove : System.Web.UI.WebControls.Parameter -> unitPublic Sub Remove (parameter As Parameter)参数
- parameter
- Parameter
要从 Parameter 移除的 ParameterCollection。
示例
下面的代码示例演示如何使用Remove方法和Item[]索引器从ParameterCollection集合中删除Parameter对象。 在此示例中，将多个 QueryStringParameter 对象添加到 SelectParameters 集合中，从集合中删除一个 QueryStringParameter 对象，并在页面加载时打印集合的顺序。
<%@page Language="C#" %>
<SCRIPT runat="server">
private void Page_Load(object sender, EventArgs e) {
SqlDataSource aSqlDataSource = new SqlDataSource();
// Security Note: The SqlDataSource uses a QueryStringParameter,
// Security Note: which does not perform validation of input from the client.
QueryStringParameter qs1 =
new QueryStringParameter("QueryStringParam1","requestfield1");
aSqlDataSource.SelectParameters.Add(qs1);
QueryStringParameter qs2 =
new QueryStringParameter("QueryStringParam2","requestfield2");
aSqlDataSource.SelectParameters.Add(qs2);
QueryStringParameter qs3 =
new QueryStringParameter("QueryStringParam3","requestfield3");
aSqlDataSource.SelectParameters.Add(qs3);
// Remove the QueryStringParameter named QueryStringParameter2
// using the Remove method and the ParameterCollection indexer
// property.
aSqlDataSource.SelectParameters.Remove( aSqlDataSource.SelectParameters["QueryStringParam2"] );
// Iterate through the ParameterCollection and print out the
// names of the Parameters contained by it.
foreach (Parameter aParameter in aSqlDataSource.SelectParameters) {
Response.Write(aParameter.Name + "<BR>");
}
}
</SCRIPT>
<%@page Language="VB" %>
<SCRIPT runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
Dim aSqlDataSource As New SqlDataSource()
' Security Note: The SqlDataSource uses a QueryStringParameter,
' Security Note: which does not perform validation of input from the client.
Dim qs1 As New QueryStringParameter("QueryStringParam1","requestfield1")
aSqlDataSource.SelectParameters.Add(qs1)
Dim qs2 As New QueryStringParameter("QueryStringParam2","requestfield2")
aSqlDataSource.SelectParameters.Add(qs2)
Dim qs3 As New QueryStringParameter("QueryStringParam3","requestfield3")
aSqlDataSource.SelectParameters.Add(qs3)
' Remove the QueryStringParameter named QueryStringParameter2
' using the Remove method and the ParameterCollection indexer
' property.
aSqlDataSource.SelectParameters.Remove( aSqlDataSource.SelectParameters("QueryStringParam2") )
' Iterate through the ParameterCollection and print out the
' names of the Parameters contained by it.
Dim aParameter As Parameter
For Each aParameter in aSqlDataSource.SelectParameters
Response.Write(aParameter.Name & "<BR>")
Next
End Sub ' Page_Load
</SCRIPT>
注解
使用此方法从集合中删除指定的 Parameter 对象 ParameterCollection 。