Pass parameters from ASP.NET to stored procedure in SQL server and get data back from SQL server with the parameters' input and view it on a gridvew

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I have four DropDownList in Asp.Net. So I want to send values selected from the DropDownLists as four parameters to my stored procedure in Sql server and when I hit the Submit button, I want to get the data back from Sql Server to Asp.Net and publish it on a GridView. I have tried some codes. Since I am fairly new in Asp.Net, so I am not sure what is wrong with my code below.

What I have tried:

C#

protected void Button1_Click1(object sender, EventArgs e)
{
    string s = "Submit";
    SqlCommand cmd = new SqlCommand(s, con);
    DataSet ds = new DataSet();
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add("@Address", SqlDbType.VarChar).Value = DropDownList5.SelectedItem.Value;
    cmd.Parameters.Add("@Number", SqlDbType.VarChar).Value = DropDownList2.SelectedItem.Value;
    cmd.Parameters.Add("@Name", SqlDbType.VarChar).Value = DropDownList3.SelectedItem.Value;
    cmd.Parameters.Add("@Type", SqlDbType.VarChar).Value = DropDownList4.SelectedItem.Value;
    con.Open();
    cmd.ExecuteNonQuery();
    GridView1.DataSource = ds;
    GridView1.DataBind();
    con.Close();
}

Posted 14-Jun-18 7:38am

Member 13863605

Updated 19-Jun-18 5:55am

v3

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User 4180254 · Answer 1 · 2018-06-14T08:39:00

Replace your cmd.ExecuteNonQuery() by below and it should work. ExecuteNonQuery will execute the query but no data return instead it will return no of record affected and should be used to insert/delete/update statements only.

C#

//cmd.ExecuteNonQuery(); 
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);

GridView1.DataSource = ds.Table[0];
GridView1.DataBind();