Forms Data Controls :: Cascading DropDownLists In DetailsView?

Sep 10, 2010

Here is the case:

I use Visual Studio 2008 ASP.NET 3.5

I have a DetailsView control with several fields that is in insert mode. Three of them are the source of my problems and headaches.

I have three DropDownLists in template fields.

The first one is OK, bound to it's designated field in table1 in the database. The next two however have to change their bound tables according to the SelectedValue.

So far, I've managed to get it working, BUT when I insert the data I've entered, these two DropDownLists are not entered into the database.

DropDownList3 - the list that controls the other two DDLs

DropDownList4 and DropDownList5 - the list that need to change their items accordingly

DropDownList3 has six different values, so I have 6 tables for each of the other two DDLs

However I have only tried with one to see if it would work, that's why the Sub seems incomplete.

Here is the relevant part of the code:

[Code]....

And the DropDownList3_SelectedIndexChanged sub:

[Code]....

If I leave SelectedValue='<%# Bind("shelves") %>' and SelectedValue='<%# Bind("type") %>' in the <asp:DropDownList> tag of the two DDLs that change values, I get an error when the first one does the postback.

The error is:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. This error, I spent a whole day looking through forums and knowledge bases, but I could find nothing that solves my problem. Maybe the problem is me, but my boss wants this done, despite it is not my area of expertise to write code.

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