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Please review the stack trace for more information about the error and where it originated in the code. Invalid Operation Exception: Both Data Source and Data Source ID are defined on 'Grid View1'. Source Error: Since you are binding your Grid View manually in your code then remove the Data Source ID you assigned in your Grid View html markup. Do you think I may be missing something in the attached code ? Have you checked the value of the Description: An unhandled exception occurred during the execution of the current web request. I have attached the code for all I have achieved till now. However, I am not so sure how I need to handle Text Box1 and Text Box2 as I am using the Gridview table to display the data from the SQL query. Actually my requirement is to stick the results of the query into the datatable and bind the gridview (component) to the datatable. So in this case, how do I link the Gridview to the button. Also note that a gridview will not show up if there's no data from the Data Source, that's a default behavior. ) If possible could you please tell the cause of this and what should be done to rectify this ? HI, You need to add reference to namespace of System. NET Framework 3.5 to 4.0 and the error was resolved. I am about done with this now, just a last query: The data in the gridview needs to be displayed when the user clicks the (Find) button. This would mean that after you query the database with the filter parameter you fill your Data Table (for example) with the results and bind it to your gridview. I am getting this error on Datatable- Error 1 The type or namespace name 'Data Table' could not be found (are you missing a using directive or an assembly reference? Refere msdn ( for detailed explaination Thanks, Nirav HTH Thanks Vinz, I changed from . Here's a step by step example of binding Grid View with data from Data Table: NETvinz/archive/2009/02/19/binding-gridview-with-data---the-ado.Just modify your sql select query based on your requirements. Keep in mind that you need to rebind your gridview with the updated Data Source so that the changes will be reflected. As a new comer to coding, I am finding this challenging. Since the issue is related to data filtering then the problem might be with the value of the parameters you pass in into your sql WHERE clause. Principal; // here is the security namespace you need using System. I think I maybe missing some piece of Visual C code or it is not being linked properly somewhere.
Please note that a data representation control like gridview can only handle one datasource at a time. The problem now is the gridview does not refresh when the matching values are not selected from the 2 dropdown boxes.When you bind a Grid View through a Data Source ID, the Grid View will update this value since it is internally tracking the sort expression, so it knows when to switch between ascending and descending.We can implement it in this way without a performance impact because the data is not actually retrieved from the database until required, so we can build up a chain of queries up to that point and only the end result will be pulled from the database.Since it’s a Bound Field, the Text Box is going to be Control.Once we have a reference to the Text Box, we set the new first name.