1.创建自定义的特性类（继承Attribute类）。
codingas below
[AttributeUsage(AttributeTargets.Property,AllowMultiple=false,Inherited=false)]
public class FileVerification:Attribute
{
private string _regexStr;
public string RegexStr
{
get { return _regexStr; }
set { _regexStr = value; }
}
private string _showMessage;
public string ShowMessage
{
get { return _showMessage; }
set { _showMessage = value; }
}
}
2.在实体类属性上加上特性：
coding as below
public class Account
{
private string _user;
private string _password;
[FileVerification(RegexStr = @"^\w{1,50}$", ShowMessage = "请输入账号！")]
public string User
{
get { return _user; }
set { _user = value; }
}
[FileVerification(RegexStr = @"^\w{1,50}$", ShowMessage = "请输入密码！")]
public string Password
{
get { return _password; }
set { _password = value; }
}
}
3.利用正则表达式对属性的值进行验证通用类：
coding as below
public class FieldVerification<T>
{
public static string Verification(T t)
{
string returenMessage = "";
string fieldValue = "";
FileVerification fv = null;
Type customerType = typeof(T);
PropertyInfo[] pIList = customerType.GetProperties();
for (int i = 0; i < pIList.Length; i++)
{
object[] oList = pIList[i].GetCustomAttributes(typeof(FileVerification), true);
foreach (object o in oList)
{
fv = (FileVerification)o;
fieldValue = Convert.ToString(pIList[i].GetValue(t, null));
if (!Regex.IsMatch(fieldValue, fv.RegexStr))
{
returenMessage += fv.ShowMessage;
}
}
}
return returenMessage;
}
}
4.调用验证类：
coding as below
Account a = new Account();
a.User = "";
a.Password = "";
errorMessage = FieldVerification<Account>.Verification(a);
