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1 using System;
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2 using System.Reflection;
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3 using System.ComponentModel;
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4
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5 namespace BLToolkit.Validation
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6 {
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7 public abstract class ValidatorBaseAttribute : Attribute
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8 {
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9 protected ValidatorBaseAttribute()
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10 {
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11 }
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12
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13 protected ValidatorBaseAttribute(string errorMessage)
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14 {
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15 _errorMessage = errorMessage;
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16 }
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17
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18 private string _errorMessage;
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19 public virtual string ErrorMessage
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20 {
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21 get { return _errorMessage; }
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22 set { _errorMessage = value; }
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23 }
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24
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25 public abstract bool IsValid(ValidationContext context);
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26
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27 public virtual string GetErrorMessage(ValidationContext context)
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28 {
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29 return string.Format(ErrorMessage, GetPropertyFriendlyName(context));
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30 }
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31
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32 protected virtual string GetPropertyFriendlyName(ValidationContext context)
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33 {
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34 MemberInfo mi = context.MemberInfo;
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35 string className = mi.DeclaringType.Name;
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36 string fieldName = mi.Name;
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37
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38 // Get class name.
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39 //
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40 object[] attrs = mi.DeclaringType.GetCustomAttributes(typeof(FriendlyNameAttribute), true);
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41
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42 if (attrs.Length > 0)
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43 className = ((FriendlyNameAttribute)attrs[0]).Name;
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44 else
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45 {
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46 attrs = mi.DeclaringType.GetCustomAttributes(typeof(DisplayNameAttribute), true);
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47
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48 if (attrs.Length > 0)
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49 className = ((DisplayNameAttribute)attrs[0]).DisplayName;
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50 }
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51
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52 // Get field name.
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53 //
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54 attrs = mi.GetCustomAttributes(typeof(FriendlyNameAttribute), true);
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55
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56 if (attrs.Length > 0)
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57 fieldName = ((FriendlyNameAttribute)attrs[0]).Name;
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58 else
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59 {
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60 attrs = mi.GetCustomAttributes(typeof(DisplayNameAttribute), true);
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61
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62 if (attrs.Length > 0)
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63 fieldName = ((DisplayNameAttribute)attrs[0]).DisplayName;
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64 }
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65
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66 return string.IsNullOrEmpty(className)? fieldName: className + "." + fieldName;
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67 }
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68 }
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69 }
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