Introduction:
Here
I will explain how to add or bind datatable column data with comma separated
values in asp.net.
Description:
In
previous article I explained about self join in SQL server, Joins in SQL Server and many more
articles relating to SQL
Server.
Now I will explain how to add datatable data with comma separated values in
asp.net.
If we want to bind the datatable column data with comma
operator we need to write syntax like this
C#
Code
DataTable dt = new DataTable();
string str = string.Empty;
for (int i = 0; i <
dt.Rows.Count; i++)
{
str = str + dt.Rows[i]["UserName"].ToString();
str += (i < dt.Rows.Count-1) ? "," : string.Empty;
}
|
VB.NET
Code
Dim dt As New DataTable()
Dim str As String = String.Empty
For i As Integer = 0 To
dt.Rows.Count - 1
str = str & dt.Rows(i)("UserName").ToString()
str += If((i
< dt.Rows.Count - 1), ",", String.Empty)
Next
|
Now I will explain this with one with simple example for
that first design your aspx page like this
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Bind or Add Datatable data with Comma Separated values</title>
</head>
<body>
<form id="form1"
runat="server">
<div>
<asp:Label ID="lblUserName"
runat="server"
/>
</div>
</form>
</body>
</html>
|
Now open code behind page and add the following
namespace references
using System;
using System.Data;
using System.Data.SqlClient;
|
After add namespaces write the following code in code
behind
C#
code
protected void
Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
BindData();
}
}
private void
BindData()
{
SqlConnection con = new SqlConnection("Data
Source=SureshDasari;Initial Catalog=MySampleDB;Integrated Security=true");
con.Open();
SqlCommand cmd = new SqlCommand("SELECT
UserName FROM UserDetails",con);
SqlDataAdapter da=new SqlDataAdapter(cmd);
DataSet ds=new DataSet();
DataTable dt=new DataTable();
da.Fill(ds);
dt = ds.Tables[0];
string str = string.Empty;
for (int i = 0; i <
dt.Rows.Count; i++)
{
str = str + dt.Rows[i]["UserName"].ToString();
str += (i < dt.Rows.Count-1) ? "," : string.Empty;
}
lblUserName.Text = str;
}
|
VB.NET
Code
Imports System.Data
Imports System.Data.SqlClient
Partial Class
Default
Inherits System.Web.UI.Page
Protected Sub
Page_Load(ByVal sender As Object, ByVal e As
EventArgs) Handles Me.Load
If Not IsPostBack Then
BindData()
End If
End Sub
Private Sub
BindData()
Dim con As New SqlConnection("Data
Source=SureshDasari;Initial Catalog=MySampleDB;Integrated Security=true")
con.Open()
Dim cmd As New SqlCommand("SELECT
UserName FROM UserDetails", con)
Dim da As New SqlDataAdapter(cmd)
Dim ds As New DataSet()
Dim dt As New DataTable()
da.Fill(ds)
dt = ds.Tables(0)
Dim str As String = String.Empty
For i As Integer = 0 To
dt.Rows.Count - 1
str = str & dt.Rows(i)("UserName").ToString()
str += If((i
< dt.Rows.Count - 1), ",", String.Empty)
Next
lblUserName.Text = str
End Sub
End Class
|
If we run above code we will get output like
this
Output
 |
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