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Multiple controls with the same ID 'DXSelBtn0' were found. FindControl requires that controls have unique IDs.

Answer 1

A:

If you are creating the button programatically, make sure you explicitly set the Id of the control to something unique. Or if you are in a loop, make sure you explicitly define a unique id for each control.

NerdFury 2010-07-27 12:27:28

I don't create the button programatically, here is the code to create it :<dxe:ASPxButton ID="btnAddToList" runat="server" AutoPostBack="False" OnClick="btnAddToList_Click" Text="Listeye Ekle" ClientInstanceName="btnAdd"></dxe:ASPxButton>When i delete OnClick="btnAddToList_Click", i don't get the error.

mehmetserif 2010-07-27 12:31:42

Are you using any other DevExpress controls? You say removing the event handler fixes the problem, but do you see the problem when you click the button, or just on a normal page load? What are you attempting to do in the click event?

NerdFury 2010-07-27 14:18:50

Yes, i use other Devexpress controls but there is only one Button control. When i click the button i see the error page. On page load there is no problem. I try to get selected rows' values of an AspxGridView control on the click event.

mehmetserif 2010-07-27 14:32:08

Answer 2

A:

The DXSelBtn is a prefix used to generate IDs for select checkBoxes in the command column of the ASPxGridView. I tend to think that you are manipulating the grid in some way. Sorry, it is impossible to tell what causes this issue without your code.

DevExpress Team 2010-07-27 14:57:01

Answer 3

A:

Yes i added 3 more GridViewCommandColumn to have 3 more checkboxes at run-time, actually i can add them in Design-time but does it change anything? and how can solve this issue, here is the code to add those columns:

GridViewCommandColumn coEqual = new GridViewCommandColumn();
        coEqual.Caption = "Eşittir";
        coEqual.Name = "Eşittir";
        coEqual.VisibleIndex = 7;
        coEqual.ShowSelectCheckbox = true;
        coEqual.CellStyle.HorizontalAlign = HorizontalAlign.Center;

    detailGrid.Columns.Insert(7, coEqual);

Thanks,

mehmetserif 2010-07-27 15:06:39

Hmm, what is the goal of having three command columns with the SelectionCheckBox in the same grid?

DevExpress Team 2010-07-27 15:53:50

User will select one or more row and for each row he will select "equal-not equal-bigger" checkboxes. But those fields not in the datasource so i will handle the selections programatically. I tried to have 3 GridViewDataCheckColumn but because of they are not in the datasource checkboxes come with question marks and cannot use them.

mehmetserif 2010-07-27 16:14:19

Answer 4

A:

I would suggest that you create unbound columns instead as it is described in the topic available at:

http://documentation.devexpress.com/#AspNet/CustomDocument3732

DevExpress Team 2010-07-27 16:40:42

I tried unbound columns but i still get question marks so i cannot select those fields, am i missing something?

mehmetserif 2010-07-27 21:57:59

I don't want to use Edit mode of the AspxGridView, instead of that i want user to select those unbound columns without getting into the edit mode.

mehmetserif 2010-07-28 11:29:44

Answer 5

A:

I added unbound columns at run-time on AspxGridView.Init event but this i got question marks on those fields so i cannot select checkboxes. What can i do to solve this problem or to select them should user edit the row but i don't want user to edit the row. Here is what i did to add those unboundcolumns:

GridViewDataCheckColumn coEqual = new GridViewDataCheckColumn();
            coEqual.Caption = "Eşittir";
            coEqual.Name = "Eşittir";
            coEqual.UnboundType = DevExpress.Data.UnboundColumnType.Boolean;
            coEqual.VisibleIndex = 7;

            coEqual.CellStyle.HorizontalAlign = HorizontalAlign.Center;
            detailGrid.Columns.Add(coEqual);

I really need this, thank you.

mehmetserif 2010-07-28 15:25:58

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Multiple controls with the same ID 'DXSelBtn0' were found. FindControl requires that controls have unique IDs.

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