Question

I created a dynamic UI that shows each module that the user has added to their selection and all the assessments for that module underneath the module name,
All data is saved in array lists – including objects as textBoxes and labels.

Here’s what it looks like:
http://www.4shared.com/photo/fullsize/Ja3jHpRJ/screen1.html

Then the user should enter their marks for each assessments
And the Calculate button should calculate their overall mark for each module
At this stage I am just adding the marks together.
The program works fine when there’s only one module added, but when there are more modules it seems to think that a TextBox is empty, even though i fill them all with numbers.

here is my code

private void calculateButton_Click(object sender, EventArgs e)

    {
        int modLength = dat.ModuleTitle.Count;
        int modAsses = 0;
        int loopCount = 0;

        for (int i = 0; i < modLength; i++)
        {

            int total = 0;

            if ((textboxComputer[loopCount] as TextBox).Text == "")
            {
                Console.WriteLine("!!!!!");
            }
            else
            {
                modAsses = int.Parse(dat.ModuleAssessNum[i].ToString());
                for (int y = 0; y < modAsses; y++)
                {

                    total = total + int.Parse((textboxComputer[loopCount] as TextBox).Text.ToString());

                    loopCount = loopCount + 1;
                }

                Console.WriteLine(total);
            }
        }
    }  

When i add two or more modules it displays the “!!!!!” message, but calculates the mark for the first module added.

here’s some output
http://www.4shared.com/photo/fullsize/PlY29BMQ/screen2.html

Answer 1

You need to make sure that the code that creates the extra dynamic elements on screen is being called as part of the page load, so that then the viewstate is inserted back into the elements and can be read back out by your code.