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GridView Tips and Tricks using ASP.NET 2.0
Posted Date: 30 Apr 2008 Resource Type: Code Snippets Category: ASP.NET GridView
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Posted By: Vivs Member Level: Gold
Rating:  Points: 25
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Tip 1: Add, Update, Delete Records in a Gridview using SqlDataSource
By default, the GridView control doesn’t have support for inserting new records. However you can use the built-in edit or delete functionality of the GridView control. Let us explore how to insert new records and Update and Delete existing records in Gridview. Just copy and paste the code in your project. We will be using the ‘Categories’ table in the ‘Northwind’ database.
GridView.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridView.aspx.cs" Inherits="GridView" %>
<!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>Grid View Add Update Delete</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="CategoryID"
DataSourceID="SqlDataSource1" ShowFooter="true" AllowPaging="True" AllowSorting="True" OnRowCommand="GridView1_RowCommand">
<Columns>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True"/>
<asp:TemplateField HeaderText="CategoryID" InsertVisible="False" SortExpression="CategoryID">
<EditItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("CategoryID") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("CategoryID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="CategoryName" SortExpression="CategoryName">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("CategoryName") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("CategoryName") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="CategoryNameTextBox" Runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Description" SortExpression="Description">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Description") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("Description") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="DescriptionTextBox" Runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:templatefield>
<footertemplate>
<asp:linkbutton id="btnNew" runat="server" commandname="New" text="New" />
</footertemplate>
</asp:templatefield>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Data Source=SUPROTIM;Initial Catalog=Northwind;Integrated Security=True"
DeleteCommand="DELETE FROM [Categories] WHERE [CategoryID] = @CategoryID" InsertCommand="INSERT INTO [Categories] ([CategoryName], [Description]) VALUES (@CategoryName, @Description)"
ProviderName="System.Data.SqlClient" SelectCommand="SELECT [CategoryID], [CategoryName], [Description] FROM [Categories]"
UpdateCommand="UPDATE [Categories] SET [CategoryName] = @CategoryName, [Description] = @Description WHERE [CategoryID] = @CategoryID">
<DeleteParameters>
<asp:Parameter Name="CategoryID" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="CategoryName" Type="String" />
<asp:Parameter Name="Description" Type="String" />
<asp:Parameter Name="CategoryID" Type="Int32" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="CategoryName" Type="String" />
<asp:Parameter Name="Description" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
GridView.aspx.cs
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
SqlConnection conn = new SqlConnection(
ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
try
{
if (e.CommandName.Equals("New"))
{
LinkButton btnNew = e.CommandSource as LinkButton;
GridViewRow row = btnNew.NamingContainer as GridViewRow;
if (row == null)
{
return;
}
TextBox txtCatName = row.FindControl("CategoryNameTextBox") as TextBox;
TextBox txtDescription = row.FindControl("DescriptionTextBox") as TextBox;
SqlCommand cmd = new SqlCommand(
"INSERT INTO [Categories] ([CategoryName], [Description]) VALUES (@CategoryName, @Description)",
conn);
cmd.Parameters.AddWithValue("CategoryName", txtCatName.Text);
cmd.Parameters.AddWithValue("Description",txtDescription.Text);
conn.Open();
if (cmd.ExecuteNonQuery() == 1)
{
GridView1.DataBind();
}
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
}
Web.config
<connectionStrings>
<addname="NorthwindConnectionString"connectionString="Data Source =.;Integrated Security = SSPI; Initial Catalog=Northwind;"/>
</connectionStrings>
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