textbox只能输入数值，字母，汉字，小数，日期，身份验证

最新推荐文章于 2023-08-27 15:05:31 发布

原创最新推荐文章于 2023-08-27 15:05:31 发布 · 800 阅读

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CC 4.0 BY-SA版权

文章标签：

#textbox #object #class

本文介绍了一个C#类，该类提供了多种方法来限制不同类型的文本框输入，包括仅限数字、字母、汉字、四位数字或小数、日期及合法身份证号等。

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class Regular

{

/// <summary>

/// 只能输入数值型

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

public void IsDigit(object sender, KeyPressEventArgs e)

{

if (e.KeyChar != 8 && e.KeyChar != 13 && (e.KeyChar > 57 || e.KeyChar < 48))

e.Handled = true;

}

/// <summary>

/// 只能输入字母

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

public void IsEnglish(object sender, KeyPressEventArgs e)

{

if(!char.IsLetter(e.KeyChar)&&e.KeyChar!=8&&e.KeyChar!=13&&e.KeyChar !=32)

e.Handled=true;

}

/// <summary>

/// 只能输入汉字

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

public void IsChinese(object sender, KeyPressEventArgs e)

{

if ((e.KeyChar > 0 && e.KeyChar < 7) || (e.KeyChar > 9 && e.KeyChar < 177))

{

e.Handled = true;

MessageBox.Show("只能输入汉字");

}

/// <summary>

/// 只能输入4位有效数字或小数

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

public void IsNumber(object sender, KeyPressEventArgs e)

{

if (e.KeyChar != 8 && e.KeyChar != 13 && !char.IsNumber(e.KeyChar)&&e.KeyChar!=46)

{

e.Handled = true;

}

else if (Char.IsPunctuation(e.KeyChar))

{

if (e.KeyChar == '.')

{

if (((TextBox)sender).Text.LastIndexOf('.') != -1)

{

e.Handled = true;

}

else

{

e.Handled = true;

}

else if (e.KeyChar != 8 && e.KeyChar != 13)

{

if (((TextBox)sender).Text.Length+1 > 4)

{

e.Handled = true;

}

/// <summary>

/// 只能输入日期

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

public void IsData(object sender, KeyPressEventArgs e)

{

if (e.KeyChar != 8 && e.KeyChar != 13 && !char.IsNumber(e.KeyChar))

{

e.Handled = true;

}

//DateTime.Parse(((TextBox)sender).Text.ToString ());

}

/// <summary>

/// 输入合法的身份证

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

public void IsIdentityCards(object sender, KeyPressEventArgs e)

{

if (!char.IsLetterOrDigit(e.KeyChar) && e.KeyChar != 8 && e.KeyChar != 13)

{

e.Handled = true;

}

else if (((TextBox)sender).Text.Length < 17)

{

if (char.IsLetter(e.KeyChar) && e.KeyChar != 8 && e.KeyChar != 13)

{

e.Handled = true;

}

else if (((TextBox)sender).Text.Length == 18)

{

if ((e.KeyChar != 88 && e.KeyChar != 120) && !char.IsDigit(e.KeyChar) && e.KeyChar != 8 && e.KeyChar != 13)

{

e.Handled = true;

}

else if (e.KeyChar != 8 && e.KeyChar != 17)

{

if (((TextBox)sender).Text.Length > 17)

e.Handled = true;

}

}，汉字