How to row updating in grid view control clicking the edit button

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C#

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
      
        cn.Open();
        int customerid = Convert.ToInt32(((TextBox)GridView1.Rows[e.RowIndex].Cells[0].Controls[0]).Text);
       String customername =(((TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]).Text);
       String email = (((TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0]).Text);
       String amount = (((TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0]).Text);
        SqlCommand cmd = new SqlCommand("update customer set customername='" + TextBox2.Text + "' where customerid='" + TextBox1.Text + "' ",cn);
        cmd.ExecuteNonQuery();
        cn.Close();
        Console.WriteLine("update end");
        BindGridview();
        clear();
          
     }

i was updating My grid view control update button but it is not update please help me..

What I have tried:

i was updating My grid view control update button but it is not update please help me..

Posted 5-Jun-18 2:52am

Member 13859554

Updated 5-Jun-18 2:59am

Herman<T>.Instance

v2

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Comments

Herman<T>.Instance 5-Jun-18 9:02am

How is your GridView control in the ASPX file set up.
Are you using DataKeynames for your customerId?
Try catch for any error?
What is the ID of the TextBox that holds the customerID?
What is the ID of the TextBox that holds the CustomerName?
Have you set the EditIndex and the SelectedIndex when setting the GridView in the RowEditing event?

Questions end with an ? So maybe modify your question

Richard Deeming 6-Jun-18 11:32am

SqlCommand cmd = new SqlCommand("update customer set customername='" + TextBox2.Text + "' where customerid='" + TextBox1.Text + "' ",cn);

Not like that!

Your code is vulnerable to SQL Injection[^]. NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

Everything you wanted to know about SQL injection (but were afraid to ask) | Troy Hunt[^]
How can I explain SQL injection without technical jargon? | Information Security Stack Exchange[^]
Query Parameterization Cheat Sheet | OWASP[^]

using (SqlCommand cmd = new SqlCommand("update customer set customername = @customername where customerid = @customerid",cn))
{
    cmd.Parameters.AddWithValue("@customername", TextBox2.Text);
    cmd.Parameters.AddWithValue("@customerid", TextBox1.Text);
    
    cmd.ExecuteNonQuery();
}

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