textbox输入控制

[hsie168518]

一个texbox控件，我想控制它的输入，

1.只能输6位
2.前3个只能为字母，
3.后3位自能为数字，

怎么做到？

[hsie168518]

winform

[wiki14]

正则表达式

[hsie168518]

能不能不说废话

[cheng_feng001]

WebForm里有验证控件，不知道WinForm里有没有提供

[cppfaq]

用正则来进行校验
Regex regex=new Regex(@"^\w{3}\d{3}$");

[wiki14]

[Quote=引用 3 楼 hsie168518 的回复:]
能不能不说废话
[/Quote]

哥，你又没有问我用什么正则。
^\w{3}\d{3}$
= =

[lvanjie]

在
private void texbox_KeyPress(object sender, KeyPressEventArgs e)
{
}
中通过代码验证限制了

[Forrest23]

 private void Form1_Load(object sender, EventArgs e)
        {
            this.textBox1.MaxLength = 6;
        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (this.textBox1.Text.Length <3)
            {
                if (char.IsLetter(e.KeyChar) == true || char.IsControl(e.KeyChar) == true)
                {
                    e.Handled = false;


                }
                else
                {
                    e.Handled = true;
                }

            }
            if (this.textBox1.Text.Trim().Length >= 3)
            {
                if (char.IsDigit(e.KeyChar) == true || char.IsControl(e.KeyChar) == true)
                {
                    e.Handled = false;

                }
                else
                {
                    e.Handled = true;
                }
            
            }

[风之影子]

先进行输入限制如下:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (this.textBox1.Text.Trim().Length == 6)
            {
                e.Handled = true;
            }
            if (this.textBox1.Text.Trim().Length < 3)
            {
                if ((e.KeyChar < 97 || e.KeyChar > 122)  && (e.KeyChar != 8) && (e.KeyChar != 46))
                {
                    e.Handled = true;
                }
            }
            else if (this.textBox1.Text.Trim().Length >=3)
            {
                if ((e.KeyChar < 48 || e.KeyChar > 57) && (e.KeyChar != 8) && (e.KeyChar != 46))
                {
                    e.Handled = true;
                }
            }
        }

然后在文本框失去焦点时用上面几位的正则来进行判断

[wuyi8808]

这种情况可以考虑用 MaskedTextBox

[wuyi8808]

MaskedTextBox1.Mask = "LLL000";

[风之影子]

改为下面的字母支持大小写

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (this.textBox1.Text.Trim().Length == 6)
            {
                e.Handled = true;
            }
            if (this.textBox1.Text.Trim().Length < 3)
            {
                if (((e.KeyChar < 97 || e.KeyChar > 122) && (e.KeyChar != 8) && (e.KeyChar != 46)) && ((e.KeyChar < 65 || e.KeyChar > 90) && (e.KeyChar != 8) && (e.KeyChar != 46)))
                {
                    e.Handled = true;
                }
            }
            else if (this.textBox1.Text.Trim().Length >=3)
            {
                if ((e.KeyChar < 48 || e.KeyChar > 57) && (e.KeyChar != 8) && (e.KeyChar != 46))
                {
                    e.Handled = true;
                }
            }
        }

[风之影子]

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (this.textBox1.Text.Trim().Length == 6)
{
e.Handled = true;
}
if (this.textBox1.Text.Trim().Length < 3)
{
if (((e.KeyChar < 97 || e.KeyChar > 122) && (e.KeyChar != 8) && (e.KeyChar != 46)) && ((e.KeyChar < 65 || e.KeyChar > 90) && (e.KeyChar != 8) && (e.KeyChar != 46)))
{
e.Handled = true;
}
}
else if (this.textBox1.Text.Trim().Length >=3)
{
if ((e.KeyChar < 48 || e.KeyChar > 57) && (e.KeyChar != 8) && (e.KeyChar != 46))
{
e.Handled = true;
}
}
}

[风之影子]

建议用MaskedTextBox