C＃计算多个文本框的字符

Question

I have two (and going to be more but for this example I will keep it to two) text boxes that I want to total the character count into one label.

The two text boxes I have are called probDescTextbox and stepsToRepoTextbox.

I am using winforms and a TextChanged event. I am not sure if there is a way to get this to work without having multiple TextChanged events but if i nest it i get an error and if i make a second one, i cannot seem to get the numbers to add.

CODE:

    private void probDescTextBox_TextChanged(object sender, EventArgs e)
    {
        int probDescLimit = probDescTextBox.Text.Length;
        int stepsToRepoLimit = stepsToRepoTextBox.Text.Length;
        int charLimit = probDescLimit + stepsToRepoLimit;

        if (charLimit >= 50)
        {
            probDescCharLabel.ForeColor = Color.Red;
            probDescCharLabel.Text = charLimit.ToString() + " Over Limit!!";
        }
        else
        {
            probDescCharLabel.ForeColor = Color.Black;
            probDescCharLabel.Text = charLimit.ToString();
        }
    }

I am sure this is simple enough but I cannot find an example using multiple text boxes.

Thanks in advance.

Answer 1

You could wire the text change event to the same handler.

Edit:

1.) Change the name of your event handler to something more generic so that you know it's not specific to the probDescTextBox :

 private void note_TextChanged(object sender, EventArgs e)
    {
       //Same code as you have above, or see note...
    }

Note : If you need to know which textbox fired the event see the answer here . You can inspect the sender. This will allow you to only set the forecolor of the textbox which fired the event.

2.) Wire up the event handler in your form's constructor as shown below, or if you're using the designer, change the values in each text box's properties window:

public MyForm()
{
     //wire each textbox's TextChanged event to the same handler
     probDescTextBox.TextChanged += note_TextChanged;
     stepsToRepoTextbox.TextChanged += note_TextChanged;
}