How do I properly set the DataSourceID property?

Question

0.00/5 (No votes)

See more:

On the design side, I have this:

<asp:DropdownList ID="ddlSystemSubTypeSearch" runat="server" DataSourceID="sdsSystemSubTypes" DataTextField="stSystemSubType" DataValueField="sstSTID" Width="250px"></asp:DropdownList>

And on the code behind side, I have this:

VB

If Trim(Request.QueryString("SystemSubType")) <> String.Empty Then
                  Me.ddlSystemSubTypeSearch.DataBind()
                  Me.ddlSystemSubTypeSearch.SelectedValue = Request.QueryString("SystemSubType").Trim
              End If

VB

Private Sub ddlSystemSubTypeSearch_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlSystemSubTypeSearch.DataBound
       Me.ddlSystemSubTypeSearch.Items.Insert(0, New ListItem("", -1))
   End Sub

When I run the program, I get this error:

Quote:
The DataSourceID of 'ddlSystemSubTypeSearch' must be the ID of a control of type IDataSource. A control with ID 'sdsSystemSubTypes' could not be found.

Seems I can't figure out what is wrong with the code.
Any help will be greatly appreciated.

Posted 21-Jul-14 9:31am

Member 10961519

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2014-07-22T09:10:00

Solution 1

The error is telling you that it is searching for a Control with ID sdsSystemSubTypes. If you have not declared any of such DataSource control like SqlDataSource or something, then it would throw you this.

Refer - BaseDataBoundControl.DataSourceID Property[^] for one example.

Posted 22-Jul-14 9:10am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Member 10961519 · Accepted Answer · 2014-07-22T09:18:00

I declared the control like this:

XML

<asp:SqlDataSource ID="sdsSystemSubTypes" runat="server"
          ConnectionString="<%$ ConnectionStrings:ClassicAutomation %>"
          ProviderName="<%$ ConnectionStrings:ClassicAutomation.ProviderName %>"
          SelectCommand="spWC_GetSystemSubTypes" SelectCommandType="StoredProcedure">
  </asp:SqlDataSource>

And it solved the problem. Thanks Tadit.