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Get multiple datakeyname values from gridview rowcommand in asp.net

Jun 13, 2012
Introduction

In this article I will explain how to declare multiple datakeynames in gridview and how to get multiple datakey values in gridview rowcommand event in asp.net. 

Description:

In previous posts I explained many articles relating to
gridview now I will explain how to declare multiple datakeyname values in gridview and how to get datakeyname values from gridview in gridview rowcommand event in asp.net.

Generally in gridview we will declare DataKeyNames values like this

DataKeyNames="yourColumnName"
If we want to get this DataKeyNames value from gridview in rowcommand event we will get it like this

protected void gvUserInfo_RowDataCommand(object sender, GridViewCommandEventArgs e)
{
GridViewRow gvrow;
string str = gvUserInfo.DataKeys[gvrow.RowIndex].Value.ToString();
}
If we want to declare multiple DataKeyNames values we will declare it as

DataKeyNames="Column1,Column2,Column3"
Now if we want get these DataKeyNames values we will declare it like this

protected void gvUserInfo_RowDataCommand(object sender, GridViewCommandEventArgs e)
{
GridViewRow gvrow;
string value1 = gvUserInfo.DataKeys[gvrow.RowIndex].Values[0].ToString();
string value2 = gvUserInfo.DataKeys[gvrow.RowIndex].Values[1].ToString();
string value3 = gvUserInfo.DataKeys[gvrow.RowIndex].Values[2].ToString();
}
We can get these datakeynames values with datakeyname also that would be like this

protected void gvUserInfo_RowDataCommand(object sender, GridViewCommandEventArgs e)
{
string value1 = gvUserInfo.DataKeys[gvrow.RowIndex].Values["Column1"].ToString();
string value2 = gvUserInfo.DataKeys[gvrow.RowIndex].Values["Column2"].ToString();
string value3 = gvUserInfo.DataKeys[gvrow.RowIndex].Values["Column3"].ToString();
}
If we want to get DataKeyNames values with foreach statement in rowcommand event that would be like this

 protected void gvUserInfo_RowDataCommand(object sender, GridViewCommandEventArgs e)
{
foreach (GridViewRow gvrow in gvUserInfo.Rows)
{
string value1 = gvUserInfo.DataKeys[gvrow.RowIndex].Values[0].ToString();
string value2 = gvUserInfo.DataKeys[gvrow.RowIndex].Values[1].ToString();
string value3 = gvUserInfo.DataKeys[gvrow.RowIndex].Values[2].ToString();
}
}
For sample check below code


<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Get Gridview datakeyname values in rowcommand event in asp.net</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gvUserInfo" runat="server" AutoGenerateColumns="false" DataKeyNames="MobileId,MobileName" OnRowCommand="gvUserInfo_RowDataCommand" >
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
<Columns>
<asp:BoundField DataField="MobileId" HeaderText="MobileId" />
<asp:BoundField DataField="MobileName" HeaderText="MobileName" />
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
After completion of aspx page add following namespaces in codebehind

C# Code


using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.UI.WebControls;
After that add following code in code behind


protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlConnection con = new SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB");
con.Open();
SqlCommand cmd = new SqlCommand("select * from MobileDetails order by Priority asc", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
gvUserInfo.DataSource = ds;
gvUserInfo.DataBind();
}
}
protected void gvUserInfo_RowDataCommand(object sender, GridViewCommandEventArgs e)
{
foreach (GridViewRow gvrow in gvUserInfo.Rows)
{
string mobileId = gvUserInfo.DataKeys[gvrow.RowIndex].Values[0].ToString();
string mobileName = gvUserInfo.DataKeys[gvrow.RowIndex].Values[1].ToString();
}
}
}
VB.NET Code

Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.UI.WebControls

Partial Public Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
If Not IsPostBack Then
Dim con As New SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB")
con.Open()
Dim cmd As New SqlCommand("select * from MobileDetails order by Priority asc", con)
Dim da As New SqlDataAdapter(cmd)
Dim ds As New DataSet()
da.Fill(ds)
con.Close()
gvUserInfo.DataSource = ds
gvUserInfo.DataBind()
End If
End Sub
Protected Sub gvUserInfo_RowDataCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
For Each gvrow As GridViewRow In gvUserInfo.Rows
Dim mobileId As String = gvUserInfo.DataKeys(gvrow.RowIndex).Values(0).ToString()
Dim mobileName As String = gvUserInfo.DataKeys(gvrow.RowIndex).Values(1).ToString()
Next
End Sub
End Class

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12 comments :

Himanshu Pandey said...

nice artilce..really helpful and needful

kootes balu said...

super super suresh,,, god bless u..........

Anonymous said...

I am highly impress by your Articles

Shafeeq said...

But you using () bracket instead of [] ???

Anonymous said...

nice artical

shilpa said...

nice article

Anonymous said...

Nice article . we would expect more explanation on the code.

Ashwin CS said...

the use of unassigned local variable gvrow error....
help!

sivasankar vadigineni said...

super suresh ..
i am shiv from guntur

sivasankar vadigineni said...

I am your fan/

Anonymous said...

Any info on "error: CS0165: Use of unassigned local variable 'gvrow'" ?

Sandip Gend said...

Nice....

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