Fill datagridview with data from database

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C#

C#4.0

I'm filling the datagridview from database on button click. I'm retrieving the column of data to be displayed in datagridview using stored procedure

Stored procedure

CREATE PROCEDURE [dbo].[prcDisplaydataTemplate]
AS
BEGIN
(SELECT DataTable.objectOriginalName FROM dbo.DataTable)
END

Button Click Event

private void btDataTemplate_Click(object sender, EventArgs e)
{
    DataSet dsobbtemp = new DataSet();
    DBConnection objConnection = new DBConnection();
    try
    {
        objConnection.GetConnection();
        dsobbtemp = objConnection.GetDataSet("prcDisplaydataTemplate");
        dgDtParameters.DataSource = dsobbtemp;
    }
    catch (Exception)
    {
        throw;
    }
    finally
    {
        if (objConnection.sconnConnection.State == ConnectionState.Open)
        {
            objConnection.CloseConnection();
        }
    }
}

GetConnection Method

public void GetConnection()
        {
            try
            {
                sconnConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionString"].ToString());
                sconnConnection.Open();
            }
            catch (SqlException) { throw; }


        }

GetDataSet Method

public DataSet GetDataSet(string sql)
       {
           DataSet dataset = new DataSet();
           SqlDataAdapter adapter = new SqlDataAdapter();
           SqlCommand cmd = new SqlCommand(sql, this.sconnConnection);
           adapter.SelectCommand = cmd;
           adapter.Fill(dataset);
           return dataset;
       }

Where I have went wrong my datagridview displays in blue color without any data

Thanks in Advance