Grid view binded with a text box unable to show results - asp.net

Question

i'm trying to bind a search textBox ( that uses a Stored Procedure ) with a grid view but when ever i run them and type the search condition ,no results are displayed and the GridView it self dosent show . i tried many ways including using a DataAdapter & DataSet to fill the results of the search textBox and then bind the DataSet to the GridView. but it didnt work either here is the code:
protected void SearchButton_Click(object sender, EventArgs e)
try
{
string con_str = ConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(con_str);
SqlCommand com = new SqlCommand("dbo.SearchRecords", con);
com.CommandType = CommandType.StoredProcedure;
SqlParameter pDocumentTitle = new SqlParameter("#Doc_Title", SearchTextBox.Text);
SqlParameter pUserID = new SqlParameter("#User_ID", SearchTextBox.Text);
SqlParameter pDocumentType = new SqlParameter("#Doc_Type", SearchTextBox.Text);
SqlParameter pDocumentDescription = new SqlParameter("#Doc_Description",SearchTextBox.Text);
com.Parameters.Add(pDocumentTitle);
com.Parameters.Add(pUserID);
com.Parameters.Add(pDocumentType);
com.Parameters.Add(pDocumentDescription);
con.Open();
SqlDataAdapter DA = new SqlDataAdapter(com);
com.ExecuteNonQuery();
DataSet t = new DataSet();
DA.Fill(t);
GridView1.DataBind();
GridView1.DataSource = t;
}
catch (Exception ex)
{
Label2.Text = ex.Message;
//throw;
}
}

Answer 1

I could be wrong but don't you need to call DataBind() after you have set the DataSource property? e.g.
GridView1.DataSource = t;
GridView1.DataBind();

Answer 2

You should change the order of binding as follow...Always write DataBind() after assigning the DataSource to Any DataControl
GridView1.DataSource = t;
GridView1.DataBind();

Answer 3

datasource must define first ,then do the binding
GridView1.DataSource = t;
GridView1.DataBind();