/// <summary>
/// 检查是否存在；
/// 控件所在窗体应有错误提供器，并通过名为ErrorProvider的公有属性访问；
/// </summary>
/// <param name="control">需要验证的控件</param>
/// <param name="match">匹配条件</param>
/// <param name="existIsValid">存在是否为有效</param>
/// <returns>控件</returns>
public static Control CheckExist(this Control control, Func <string, bool> match, bool existIsValid)
{
ValidatingUnit validatingUnit = new ValidatingUnit(control);
validatingUnit.Match = match;
validatingUnit.ErrorMessage = existIsValid ? "不存在" : "已存在";
return(control);
}
/// <summary>
/// 文本长度范围；
/// 控件所在窗体应有错误提供器，并通过名为ErrorProvider的公有属性访问；
/// </summary>
/// <param name="control">需要验证的控件</param>
/// <param name="minLength">有效的最小文本长度</param>
/// <param name="maxLength">有效的最大文本长度</param>
/// <returns>控件</returns>
public static Control LengthRange(this Control control, int minLength, int maxLength)
{
ValidatingUnit validatingUnit = new ValidatingUnit(control);
validatingUnit.Match = s => s.Length >= minLength && s.Length <= maxLength;
validatingUnit.ErrorMessage = $"长度应为{minLength}~{maxLength}位";
return(control);
}
/// <summary>
/// 确认是否与另一控件的内容一致；
/// </summary>
/// <param name="confirmControl">需要验证的控件</param>
/// <param name="referenceControl">需要参照的控件</param>
/// <returns>控件</returns>
public static Control Confirm(this Control confirmControl, Control referenceControl)
{
ValidatingUnit validatingUnit = new ValidatingUnit(confirmControl);
validatingUnit.Match = s => s == referenceControl.Text.Trim();
validatingUnit.ErrorMessage = "两次输入不一致";
return(confirmControl);
}
/// <summary>
/// 非空；
/// 控件所在窗体应有错误提供器，并通过名为ErrorProvider的公有属性访问；
/// </summary>
/// <param name="control">需要验证的控件</param>
/// <returns>控件</returns>
public static Control NotNull(this Control control)
{
ValidatingUnit validatingUnit = new ValidatingUnit(control);
validatingUnit.Match = s => !string.IsNullOrEmpty(s);
validatingUnit.ErrorMessage = "不能为空";
return(control);
}
/// <summary>
/// 文本长度；允许指定多个文本长度；
/// 控件所在窗体应有错误提供器，并通过名为ErrorProvider的公有属性访问；
/// </summary>
/// <param name="control">需要验证的控件</param>
/// <param name="lengths">有效的文本长度</param>
/// <returns>控件</returns>
public static Control Length(this Control control, params int[] lengths)
{
ValidatingUnit validatingUnit = new ValidatingUnit(control);
validatingUnit.Match =
s =>
{
bool isValid = false;
foreach (var length in lengths)
{
isValid |= s.Length == length;
}
return(isValid);
};
string validLength = String.Empty;
lengths.ToList().ForEach(i => validLength += i.ToString() + "或");
validatingUnit.ErrorMessage = "长度应为" + validLength.Substring(0, validLength.Length - 1) + "位";
return(control);
}