In gridview how to set column name by dynamically created column?

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In my output one column in dynamically created, that column name is column1(5) in the bellow output.i want to set that column name.

What I have tried:

This is markup code

ASP.NET

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="true"  Visible="true">
           
        </asp:GridView>

this is my code

C#

protected void Button1_Click(object sender, EventArgs e)
       {
           SqlCommand cmd = new SqlCommand(" select S1_DateTime,S1_Weight,S2_Weight,AdjustmentWeight,ABS(convert(float,S1_Weight)-convert(float,S2_Weight)-convert(float,AdjustmentWeight)) from dbo_OrderLines1 where convert(varchar(25),S1_DateTime,126) like '%" + Calendar1.SelectedDate.ToString("yyyy-MM-dd") + "%'", con1);

           SqlDataAdapter da = new SqlDataAdapter(cmd);
           DataTable dt = new DataTable();
           da.Fill(dt);
           Label1.Text ="number of rows = "+ dt.Rows.Count.ToString();
           TextBox1.Text = Calendar1.SelectedDate.ToString("yyyy-MM-dd");
           GridView1.Visible = true;
           GridView1.DataSource = dt;
           GridView1.DataBind();

       }

this is ouptput coming like this columns of the output table 1.S1_DateTime 2.S1_Weight 3.S2_Weight 4.AdjustmentWeight 5.Column1,i need to set the column1(5) name how to do?

Posted 27-May-16 0:46am

Nagarjuna99

Updated 27-May-16 1:06am

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Comments

Richard Deeming 27-May-16 7:00am

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[^]

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Richard Deeming · Accepted Answer · 2016-05-27T01:06:00

You can set the column name by giving it an alias within the query:

SQL

... ABS(...) As YourColumnName ...

Rather than converting your datetime column to a string, test whether it is greater than or equal to the selected date, and less than one day after the selected date.

SQL

S1_DateTime >= @SelectedDate And S1_DateTime < DateAdd(day, 1, @SelectedDate)

Wrap your SqlCommand and SqlConnection objects in using statements.

And use parameterized queries to avoid SQL Injection[^].

C#

using (SqlConnection con = new SqlConnection("..."))
using (SqlCommand cmd = new SqlCommand(" select S1_DateTime, S1_Weight, S2_Weight, AdjustmentWeight, ABS(convert(float, S1_Weight) - convert(float, S2_Weight) - convert(float, AdjustmentWeight)) As YourColumnName from dbo_OrderLines1 where S1_DateTime >= @SelectedDate And S1_DateTime < DateAdd(day, 1, @SelectedDate)", con))
{
    cmd.Parameters.AddWithValue("@SelectedDate", Calendar1.SelectedDate);
    
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataTable dt = new DataTable();
    da.Fill(dt);
    
    Label1.Text ="number of rows = "+ dt.Rows.Count.ToString();
    TextBox1.Text = Calendar1.SelectedDate.ToString("yyyy-MM-dd");
    GridView1.Visible = true;
    GridView1.DataSource = dt;
    GridView1.DataBind();
}