fill dropdown list by querystring

I Had Drop down list and I want to fill it with data from database through stored procedure and it had it,s value when specific query string I had two query string.

as

private void LoadWithCategory() { if (Request.QueryString["Category_Id"] != null) { using (SqlConnection Con = Connection.GetConnection()) {

            SqlCommand Com = new SqlCommand("GetProducFamilyTP", Con);
            Com.CommandType = CommandType.StoredProcedure;
            Com.Parameters.Add(Parameter.NewInt("@Category_Id",开发者_StackOverflow Request.QueryString["Category_Id"]));
            SqlDataReader DR = Com.ExecuteReader();


            if (DR.Read())
            {
                DDLProductFamily.DataSource = DR;
                DDLProductFamily.DataTextField = DR["Name"].ToString();
                DDLProductFamily.DataValueField = DR["ProductCategory_Id"].ToString();

                DDLProductFamily.DataBind();

            }
            DR.Close();
        }
    }
}

ALTER Proc GetProducFamilyTP ( @Category_Id Int ) AS Select Distinct Categories.Category_Id ,ProductCategory.Name , ProductCategory.ProductCategory_Id From Category_ProductCategory

Inner Join Categories On Category_ProductCategory.Category_Id=Categories.Category_Id Inner Join ProductCategory On Category_ProductCategory.ProductCategory_Id=ProductCategory.ProductCategory_Id Where Categories.Category_Id =@Category_Id

but this error occurred

DataBinding: 'System.Data.Common.DataRecordInternal' does not contain a property with the name '4Door'.

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The error was in ddl list when I removed it it worked well it had value=0