ParameterCollection.Insert(Int32, Parameter) 方法
定义
将指定的 Parameter 对象插入到 ParameterCollection 集合中的指定索引位置。Inserts the specified Parameter object into the ParameterCollection collection at the specified index.
public:
void Insert(int index, System::Web::UI::WebControls::Parameter ^ parameter);
public void Insert (int index, System.Web.UI.WebControls.Parameter parameter);
member this.Insert : int * System.Web.UI.WebControls.Parameter -> unit
Public Sub Insert (index As Integer, parameter As Parameter)
参数
例外
index 小于零。index is less than zero.
- 或 --or-
index 大于 Count。index is greater than Count.
示例
下面的代码示例演示如何使用 Insert 方法将 Parameter 对象添加到 ParameterCollection 集合中的特定位置。The following code example demonstrates how to use the Insert method to add a Parameter object to a ParameterCollection collection at a specific location. 在此示例中, QueryStringParameter 将多个对象添加到 SelectParameters 集合中,将一个对象 QueryStringParameter 插入到集合中,并在加载页面时打印集合的顺序。In this example, several QueryStringParameter objects are added to a SelectParameters collection, one QueryStringParameter is inserted into the collection, and the order of the collection is printed when the page loads.
<%@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 qs3 =
new QueryStringParameter("QueryStringParam3","requestfield3");
aSqlDataSource.SelectParameters.Add(qs3);
// Insert
aSqlDataSource.SelectParameters.Insert(1, new QueryStringParameter("QueryStringParam2", "requestField2") );
// 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 qs3 As New QueryStringParameter("QueryStringParam3","requestfield3")
aSqlDataSource.SelectParameters.Add(qs3)
Dim qs2 As New QueryStringParameter("QueryStringParam2","requestField2")
' Insert
aSqlDataSource.SelectParameters.Insert(1, qs2)
' 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>