Question

I had gridview which in load it will get data from database .And I added option for user to filter this grid view by DDl I did my code and the grid get data when load but when I selected DDl it didnot get any data and I made break point I noticed that Gridview1.Databind() hadnot any action on grid.So please any one help me

protected void Page_Load(object sender, EventArgs e)
{
    DataTable DT = new DataTable();

              if (DDlCity.SelectedIndex<0)
        {
            using (SqlConnection con = Connection.GetConnection())
            {
                SqlCommand Com = new SqlCommand("GetDealers", con);
                Com.CommandType = CommandType.StoredProcedure;

                SqlDataAdapter DA = new SqlDataAdapter(Com);
                DA.Fill(DT);
                GridView1.DataSource = DT;
                GridView1.DataBind();
            }

        }


    }

protected void DDlCity_SelectedIndexChanged(object sender, EventArgs e)
{
    DataTable DT = new DataTable();
    using (SqlConnection con = Connection.GetConnection())
    {
        SqlCommand Com = new SqlCommand("GetDealersByArea", con);
        Com.CommandType = CommandType.StoredProcedure;
        Com.Parameters.Add(Parameter.NewInt("@DEALERAREA_ID", DDlCity.SelectedValue));
        SqlDataAdapter DA = new SqlDataAdapter(Com);
        DA.Fill(DT);
        GridView1.DataSource = DT;
        GridView1.DataBind();
    }
}

Answer 1

i suppose you got confused on what i said…no worries
here is a working example of you give example code.

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindGridFunction();
    }
}

private void BindGridFunction()
{
    try
    {
        DataTable DT = new DataTable();
        using (SqlConnection con = Connection.GetConnection())
        {
            if(DDlCity.SelectedIndex <0)
            {
                SqlCommand Com = new SqlCommand("GetDealers", con);
                Com.CommandType = CommandType.StoredProcedure;
            }
            else
            {
                SqlCommand Com = new SqlCommand("GetDealersByArea", con);
                Com.CommandType = CommandType.StoredProcedure;
                Com.Parameters.Add(Parameter.NewInt("@DEALERAREA_ID", DDlCity.SelectedItem.Value));
            }

            SqlDataAdapter DA = new SqlDataAdapter(Com);
            DA.Fill(DT);
            GridView1.DataSource = DT;
            GridView1.DataBind();
        }
    }
    catch(Exception ex)
    {
        DT = null; // etc...etc.. clear objects created
    }

}


protected void DDlCity_SelectedIndexChanged(object sender, EventArgs e)
{
    BindGridFunction();
}

I hope you get what i was trying to say. You can change the code according to you need.

Not tested yet but m sure will work.

Note : i woud suggest to use “DDlCity.SelectedItem.Value” instead of ” DDlCity.SelectedValue”