Mercurial > silverbladetech

annotate SilverlightValidation/SilverlightValidation.PL/ViewModels/UserViewModel.cs @ 98:d0c2cac12376

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Latest version
author stevenhollidge <stevenhollidge@hotmail.com>
date Sat, 05 May 2012 22:53:40 +0100
parents 1adc1ae981ea
children db05a55e3536
rev   line source
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1 using System;
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2 using System.ComponentModel;
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3 using System.Linq;
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4 using System.Windows;
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5 using System.Windows.Input;
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6 using FluentValidation;
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7 using SilverlightValidation.Interfaces;
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8 using SilverlightValidation.Validators;
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9 using SilverlightValidation.Models;
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10 using SilverlightValidation.Commands;
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11 using GalaSoft.MvvmLight.Messaging;
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12 using SilverlightValidation.Messages;
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13
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14 namespace SilverlightValidation.ViewModels
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15 {
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16 public class UserViewModel : ViewModelBase, IUserViewModel, IEditableObject
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17 {
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18 #region Fields
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19
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20 private readonly UserModelValidator _validator;
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21 private UserModel _data;
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22 private UserModel _backup;
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23
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24 #endregion
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25
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26 #region Constructor
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27
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28 public UserViewModel(UserModel model, UserModelValidator validator)
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29 {
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30 if (model == null) throw new ArgumentNullException("model");
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31 if (validator == null) throw new ArgumentNullException("validator");
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32
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33 _validator = validator;
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34 _data = model;
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35 _backup = model.Clone() as UserModel;
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36
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37 OkCommand = new RelayCommand(OkCommandExecute);
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38 CancelCommand = new RelayCommand(CancelCommandExecute);
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39 }
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40
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41 #endregion
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42
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43 #region Methods
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44
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45 private void SetProperties(IUserModel source)
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46 {
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47 _data.Username = source.Username;
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48 _data.Password = source.Password;
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49 _data.Email = source.Email;
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50 _data.DateOfBirth = source.DateOfBirth;
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51 _data.Description = source.Description;
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52 }
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53
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54 #endregion
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55
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56 #region Properties
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57
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58 private const string UsernameProperty = "Username";
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59 public string Username
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60 {
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61 get { return _data.Username; }
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62 set
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63 {
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64 if (_data.Username != value)
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65 {
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66 _data.Username = value;
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67 RaisePropertyChanged(UsernameProperty);
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68 IsChanged = true;
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69 }
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70
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71 ClearError(UsernameProperty);
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72 var validationResult = _validator.Validate(this, UsernameProperty);
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73 if (!validationResult.IsValid)
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74 validationResult.Errors.ToList().ForEach(x => SetError(UsernameProperty, x.ErrorMessage));
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75 }
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76 }
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77
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78 private const string PasswordProperty = "Password";
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79 public string Password
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80 {
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81 get { return _data.Password; }
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82 set
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83 {
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84 if (_data.Password != value)
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85 {
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86 _data.Password = value;
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87 RaisePropertyChanged(PasswordProperty);
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88 IsChanged = true;
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89 }
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90
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91 ClearError(PasswordProperty);
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92 var validationResult = _validator.Validate(this, PasswordProperty);
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93 if (!validationResult.IsValid)
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94 validationResult.Errors.ToList().ForEach(x => SetError(PasswordProperty, x.ErrorMessage));
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95 }
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96 }
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97
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98 private const string EmailProperty = "Email";
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99 public string Email
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100 {
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101 get { return _data.Email; }
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102 set
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103 {
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104 if (_data.Email != value)
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105 {
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106 _data.Email = value;
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107 RaisePropertyChanged(EmailProperty);
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108 IsChanged = true;
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109 }
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110
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111 ClearError(EmailProperty);
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112 var validationResult = _validator.Validate(this, EmailProperty);
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113 if (!validationResult.IsValid)
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114 validationResult.Errors.ToList().ForEach(x => SetError(EmailProperty, x.ErrorMessage));
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115 }
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116 }
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117
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118 private const string DateOfBirthProperty = "DateOfBirth";
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119 public DateTime? DateOfBirth
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120 {
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121 get { return _data.DateOfBirth; }
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122 set
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123 {
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124 if (_data.DateOfBirth != value)
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125 {
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126 _data.DateOfBirth = value;
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127 RaisePropertyChanged(DateOfBirthProperty);
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128 IsChanged = true;
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129 }
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130
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131 ClearError(DateOfBirthProperty);
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132 var validationResult = _validator.Validate(this, DateOfBirthProperty);
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133 if (!validationResult.IsValid)
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134 validationResult.Errors.ToList().ForEach(x => SetError(DateOfBirthProperty, x.ErrorMessage));
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135 }
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136 }
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137
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138 private const string DescriptionProperty = "Description";
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139 public string Description
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140 {
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141 get { return _data.Description; }
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142 set
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143 {
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144 if (_data.Description != value)
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145 {
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146 _data.Description = value;
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147 RaisePropertyChanged(DescriptionProperty);
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148 IsChanged = true;
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149 }
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150
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151 ClearError(DescriptionProperty);
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152 var validationResult = _validator.Validate(this, DescriptionProperty);
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153 if (!validationResult.IsValid)
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154 validationResult.Errors.ToList().ForEach(x => SetError(DescriptionProperty, x.ErrorMessage));
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155 }
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156 }
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157
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158 #endregion
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159
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160 #region Commands
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161
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162 public ICommand OkCommand { get; set; }
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163 public ICommand CancelCommand { get; set; }
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164
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165 private void OkCommandExecute(object obj)
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166 {
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167 RefreshToViewErrors();
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168
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169 if (IsChanged && !HasErrors)
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170 {
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171 // save here
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172 Messenger.Default.Send<UserViewResponseMessage>(
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173 new UserViewResponseMessage() { UserViewModel = this });
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174 }
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175 }
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176
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177 // in case user hasn't touched the form
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178 private void RefreshToViewErrors()
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179 {
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180 Username = _data.Username;
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181 Password = _data.Password;
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182 Email = _data.Email;
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183 DateOfBirth = _data.DateOfBirth;
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184 }
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185
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186 private void CancelCommandExecute(object obj)
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187 {
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188 Messenger.Default.Send<UserViewResponseMessage>(
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189 new UserViewResponseMessage() { UserViewModel = null });
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190 }
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191
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192 #endregion
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193
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194 private void ResetFormData()
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195 {
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196 SetProperties(_backup);
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197 ClearAllErrors();
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198 IsChanged = false;
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199 }
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200
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201 public bool IsChanged { get; private set; }
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202
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203 #region IEditableObject for datagrid
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204
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205 private bool inEdit;
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206 public void BeginEdit()
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207 {
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208 if (inEdit) return;
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209 inEdit = true;
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210 }
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211
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212 public void CancelEdit()
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213 {
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214 if (!inEdit) return;
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215 inEdit = false;
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216 ResetFormData();
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217 }
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218
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219 public void EndEdit()
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220 {
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221 if (!inEdit) return;
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222 }
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223
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224 #endregion
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225 }
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226 }