I have some problem in Chapter 9. When i want to get the parameter value from reporting service, an error occur as below:

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 190: textbox.Text = parameter.DefaultValues(0)

Below is my coding in aspx.vb
For Each parameter In parameters
            Dim label As New Label
            Dim textbox As New TextBox

            label.Text = parameter.Prompt

            textbox.ID = parameter.Name
            textbox.Text = parameter.DefaultValues(0)

            Me.Panel2.Controls.Add(label)
            Me.Panel2.Controls.Add(textbox)

Reporting service cannot get the parameter from the aspx. How can i solve this problem? thanks.

I had EXACTLY the same problem.

In my case it was because I did not assign a default value for that parameter (in the report) and I was therefor assigning the text to null (can't happen). I just wrapped it in a try catch and it worked fine.

Sandy Murdock MCP

I too have the same problem. I downloaded the code, and ran the project, it gave the same error.

Does anyone have a suggestion?

Thanks,
rwiethorn

rwiethorn