Commands Parameter values in objectdatasource and sqldatasource

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in ObjectDataSource and SqlDataSource ,Commands Parameters where received their values ?

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head  runat="server">
    <title>: DataSet in Web :</title>
</head>
<body>
    <form id="form1"  runat="server">
    <div>
        <asp:Button runat="server" ID="Submit" Text="Do Post Back" />
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ShopConnectionString2 %>"
            DeleteCommand="DELETE FROM [Customer] WHERE [ID] = @ID" InsertCommand="INSERT INTO [Customer] ([Code], [FirstName], [LastName], [TimeStamp]) VALUES (@Code, @FirstName, @LastName, @TimeStamp)"
            SelectCommand="SELECT * FROM [Customer]" UpdateCommand="UPDATE [Customer] SET [Code] = @Code, [FirstName] = @FirstName, [LastName] = @LastName  WHERE [ID] = @ID">
        
        
        
        
            Product<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID"
                DataSourceID="SqlDataSource1" Font-Bold="False" Font-Size="11pt">
                <columns>
                    <asp:CommandField ShowEditButton="True" />
                    <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True"
                        SortExpression="ID" />
                    <asp:BoundField DataField="Code" HeaderText="Code" SortExpression="Code" />
                    <asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" />
                    <asp:BoundField DataField="LastName" HeaderText="LastName" SortExpression="LastName" />
                </columns>
            
        
    </div>
    </form>
</body>
</html>

Posted 29-Apr-11 4:32am

User 7427435

Updated 29-Apr-11 4:47am

v3

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jim lahey · Answer 1 · 2011-04-29T04:36:00

Solution 1

If you look at the GridView declaration you'll see this attribute:

DataSourceID="SqlDataSource1"

This connects the GridView and the DataSource. The DataSource then implicitly maps the DataField attribute to the parameters:

<asp:BoundField DataField="Code"

Posted 29-Apr-11 4:36am

jim lahey

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[no name] 29-Apr-11 10:41am

I Purpose is the Commands parameters .such as @ID,@LastName

jim lahey 29-Apr-11 10:52am

Pardon? I don't understand what you said.

Look at the DataField attributes and the parameter names. they're the same, ergo implicitly mapped.