Insert a record in sql database using vb.net datatable and datarow features

[pallabpal87]

Hi! I am trying to insert a record in sql database using vb.net dataadapter, datatable, and datarow features. I use the following code. But it show me an error.(Object reference not set to an instance of an object).Plz help me!

Imports System.Data.SqlClient
 
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cn As New SqlConnection("Data Source=.\SQLEXPRESS;Initial Catalog=drpractice;Integrated Security=True")
Dim da As New SqlDataAdapter
Dim ds As New DataSet
Try
cn.Open()
da.SelectCommand = New SqlCommand("SELECT * FROM [emp_tbl]", cn)
da.Fill(ds)
Dim dt As New DataTable
dt = ds.Tables("emp_tbl")
Dim dr As DataRow = dt.NewRow()
dr.Item("emp_id") = TextBox1.Text.Trim
dr.Item("emp_name") = TextBox2.Text.Trim
dr.Item("salary") = TextBox3.Text.Trim
dr.Item("age") = TextBox4.Text.Trim
dr.Item("emp_group") = TextBox5.Text.Trim
dt.Rows.Add(dr)
da.Update(ds)
MsgBox("Record Successfully Inserted")
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
End Class 

[zmbd]

By, simply stating that your code "doesn't work," posting a generic/jargon filled error along with code that appears to have had very little if any troubleshooting performed, and expecting someone to help doesn't usually result in much of an answer and may result in your thread being deleted. Instead, please tell us what you were expecting to happen, what actually happened, for each error: the EXACT title, error number, and descriptions that occurred and at what line in your posted code the error occurred. These are the minimum requirements for posting a question of this nature.

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