如何插入连字符“-"在 TextBox 中自动输入 2 位数字后? [英] How to insert hyphen "-" after 2 digits automatically in TextBox?

问题描述

我有一个文本框供用户输入数字.

I have one TextBox for user to input number.

当用户输入到 TextBox 时，格式应该是这样的

When user input to the TextBox then the format should be like this

01-22-34-40-33

01-22-34-40-33

我想在 TextChanged 事件处理程序中的 2 位数字后插入-".

I want to insert "-" after 2 digits in the TextChanged event handler.

我做了类似的事情但没有工作:

I do something like this but no work:

if(txtRandomThirdTypeSales.Text.Length == 2)
{
    txtRandomThirdTypeSales.Text += "-";
}
else if (txtRandomThirdTypeSales.Text.Length == 5)
{
    txtRandomThirdTypeSales.Text += "-";        
}
else if (txtRandomThirdTypeSales.Text.Length == 8)
{
    txtRandomThirdTypeSales.Text += "-";        
}
else if (txtRandomThirdTypeSales.Text.Length == 11)
{
    txtRandomThirdTypeSales.Text += "-";
}

推荐答案

你能试试这个方法吗，这可能对你有帮助.

Can you please try this way,this may be will helpful for you.

private void textBox1_KeyDown(object sender, KeyEventArgs e)
    {
        string sVal = textBox1.Text;

        if (!string.IsNullOrEmpty(sVal) && e.KeyCode != Keys.Back)
        {
            sVal = sVal.Replace("-", "");
            string newst = Regex.Replace(sVal, ".{2}", "$0-");
            textBox1.Text = newst;
            textBox1.SelectionStart = textBox1.Text.Length;
        }
    }

如果您需要任何帮助，请告诉我.

Let me know if you need any help.

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