Question

I want to create multiple labels on fly based on the number entered by user. For example if user writes 10 in textbox, 10 labels should be created with id label1 – label10 and i want to put separate text in those labels. Any idea how to do it in asp.net with c# sharp code ?

Answer 1

Something like the following should get you started.

// get user input count from the textbxo
string countString = MyTextBox.Text;
int count = 0;

// attempt to convert to a number
if (int.TryParse(countString, out count))
{
    // you would probably also want to validate the number is
    // in some range, like 1 to 100 or something to avoid
    // DDOS attack by entering a huge number.

    // create as many labels as number user entered
    for (int i = 1; i <= count; i++)
    {
        // setup label and add them to the page hierarchy
        Label lbl = new Label();
        lbl.ID = "label" + i;
        lbl.Text = "The Label Text.";
        MyParentControl.Controls.Add(lbl);
    }
}
else
{
    // if user did not enter valid number, show error message
    MyLoggingOutput.Text = "Invalid number: '" + countString + "'.";
}

Of course, you would need to correct:

1. What your actual textbox is, for MyTextBox
2. What text you have in your labels.
3. What parent control MyParentControl for adding the labels to the page.
4. What to do when the number is invalid, i.e., MyLoggingOutput.
5. Proper validation, i.e., don’t allow user to enter number > 100 or < 1, for example. You could handle with custom code or with validation controls, such as RangeValidator and CompareValidator.