DetailsViewInsertEventArgs.CommandArgument Egenskap
Definition
Viktigt
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Hämtar kommandoargumentet för infogningsåtgärden som skickas DetailsView till kontrollen.
public:
property System::Object ^ CommandArgument { System::Object ^ get(); };public object CommandArgument { get; }member this.CommandArgument : objPublic ReadOnly Property CommandArgument As ObjectEgenskapsvärde
Kommandoargumentet för infogningsåtgärden DetailsView som skickades till kontrollen.
Exempel
I följande kodexempel visas hur du anger CommandArgument egenskapen för en Button kontroll och hämtar och använder värdet under ItemInserting händelsen.
<%@ 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">
void CustomerDetailsView_ItemInserting(Object sender, DetailsViewInsertEventArgs e)
{
// Use the Values property to retrieve the key field value.
String keyValue = e.Values["CustomerID"].ToString();
if (((string)(e.CommandArgument)) == "CheckID")
{
// Insert the record only if the key field is four characters
// long; otherwise, cancel the insert operation.
if (keyValue.Length == 4)
{
// Change the key field value to upper case before inserting
// the record in the data source.
e.Values["CustomerID"] = keyValue.ToUpper();
MessageLabel.Text = "";
}
else
{
MessageLabel.Text = "The key field must have four digits.";
e.Cancel = true;
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewInsertEventArgs Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>DetailsViewInsertEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneraterows="true"
allowpaging="true" AutoGenerateInsertButton="true"
oniteminserting="CustomerDetailsView_ItemInserting"
runat="server">
<Fields>
<asp:TemplateField >
<InsertItemTemplate>
<asp:Button CommandName="Insert" CommandArgument="CheckID"
runat="server" Text="Insert with ID Check" BackColor="green" />
</InsertItemTemplate>
</asp:TemplateField>
</Fields>
</asp:detailsview>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</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">
Sub CustomerDetailsView_ItemInserting(ByVal sender As Object, ByVal e As DetailsViewInsertEventArgs)
' Use the Values property to retrieve the key field value.
Dim keyValue As String = e.Values("CustomerID").ToString()
If CStr(e.CommandArgument) = "CheckID" Then
' Insert the record only if the key field is four characters
' long; otherwise, cancel the insert operation.
If keyValue.Length = 4 Then
' Change the key field value to upper case before inserting
' the record in the data source.
e.Values("CustomerID") = keyValue.ToUpper()
MessageLabel.Text = ""
Else
MessageLabel.Text = "The key field must have four digits."
e.Cancel = True
End If
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewInsertEventArgs Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>DetailsViewInsertEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneraterows="true"
allowpaging="true" AutoGenerateInsertButton="true"
oniteminserting="CustomerDetailsView_ItemInserting"
runat="server">
<Fields>
<asp:TemplateField >
<InsertItemTemplate>
<asp:Button ID="Button1" CommandName="Insert" CommandArgument="CheckID"
runat="server" Text="Insert with ID Check" BackColor="green" />
</InsertItemTemplate>
</asp:TemplateField>
</Fields>
</asp:detailsview>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
Kommentarer
Använd egenskapen CommandArgument för att fastställa värdet för kommandoargumentet som skickas DetailsView till kontrollen. Egenskapen CommandArgument används för att ge extra information om infogning.
