Mercurial > silverbladetech

annotate SilverlightGlimpse/SilverlightValidation/ViewModels/UserViewModel.cs @ 69:a0bcd783e612

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author Steven Hollidge <stevenhollidge@hotmail.com>
date Mon, 23 Apr 2012 11:06:10 +0100
parents
children dd6bcd2535b6
rev   line source
69
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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, IUserModel, 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 _validator = validator;
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31 _data = model;
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32 _backup = model.Clone();
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33
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34 OkCommand = new RelayCommand(OkCommandExecute);
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35 CancelCommand = new RelayCommand(CancelCommandExecute);
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36 }
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37
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38 #endregion
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39
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40 #region Methods
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41
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42 private void SetProperties(IUserModel source)
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43 {
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44 _data.Username = source.Username;
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45 _data.Password = source.Password;
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46 _data.Email = source.Email;
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47 _data.DateOfBirth = source.DateOfBirth;
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48 _data.Description = source.Description;
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49 }
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50
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51 #endregion
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52
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53 #region Properties
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54
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55 private const string UsernameProperty = "Username";
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56 public string Username
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57 {
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58 get { return _data.Username; }
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59 set
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60 {
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61 if (_data.Username != value)
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62 {
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63 _data.Username = value;
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64 RaisePropertyChanged(UsernameProperty);
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65 IsChanged = true;
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66 }
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67
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68 ClearError(UsernameProperty);
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69 var validationResult = _validator.Validate(this, UsernameProperty);
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70 if (!validationResult.IsValid)
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71 validationResult.Errors.ToList().ForEach(x => SetError(UsernameProperty, x.ErrorMessage));
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72 }
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73 }
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74
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75 private const string PasswordProperty = "Password";
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76 public string Password
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77 {
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78 get { return _data.Password; }
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79 set
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80 {
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81 if (_data.Password != value)
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82 {
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83 _data.Password = value;
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84 RaisePropertyChanged(PasswordProperty);
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85 IsChanged = true;
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86 }
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87
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88 ClearError(PasswordProperty);
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89 var validationResult = _validator.Validate(this, PasswordProperty);
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90 if (!validationResult.IsValid)
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91 validationResult.Errors.ToList().ForEach(x => SetError(PasswordProperty, x.ErrorMessage));
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92 }
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93 }
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94
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95 private const string EmailProperty = "Email";
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96 public string Email
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97 {
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98 get { return _data.Email; }
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99 set
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100 {
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101 if (_data.Email != value)
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102 {
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103 _data.Email = value;
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104 RaisePropertyChanged(EmailProperty);
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105 IsChanged = true;
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106 }
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107
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108 ClearError(EmailProperty);
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109 var validationResult = _validator.Validate(this, EmailProperty);
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110 if (!validationResult.IsValid)
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111 validationResult.Errors.ToList().ForEach(x => SetError(EmailProperty, x.ErrorMessage));
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112 }
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113 }
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114
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115 private const string DateOfBirthProperty = "DateOfBirth";
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116 public DateTime? DateOfBirth
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117 {
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118 get { return _data.DateOfBirth; }
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119 set
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120 {
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121 if (_data.DateOfBirth != value)
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122 {
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123 _data.DateOfBirth = value;
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124 RaisePropertyChanged(DateOfBirthProperty);
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125 IsChanged = true;
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126 }
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127
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128 ClearError(DateOfBirthProperty);
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129 var validationResult = _validator.Validate(this, DateOfBirthProperty);
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130 if (!validationResult.IsValid)
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131 validationResult.Errors.ToList().ForEach(x => SetError(DateOfBirthProperty, x.ErrorMessage));
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132 }
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133 }
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134
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135 private const string DescriptionProperty = "Description";
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136 public string Description
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137 {
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138 get { return _data.Description; }
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139 set
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140 {
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141 if (_data.Description != value)
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142 {
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143 _data.Description = value;
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144 RaisePropertyChanged(DescriptionProperty);
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145 IsChanged = true;
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146 }
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147
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148 ClearError(DescriptionProperty);
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149 var validationResult = _validator.Validate(this, DescriptionProperty);
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150 if (!validationResult.IsValid)
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151 validationResult.Errors.ToList().ForEach(x => SetError(DescriptionProperty, x.ErrorMessage));
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152 }
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153 }
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154
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155 #endregion
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156
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157 #region Commands
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158
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159 public ICommand OkCommand { get; set; }
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160 public ICommand CancelCommand { get; set; }
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161
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162 private void OkCommandExecute(object obj)
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163 {
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164 RefreshToViewErrors();
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165
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166 if (IsChanged && !HasErrors)
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167 {
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168 // save here
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169 Messenger.Default.Send<UserViewResponseMessage>(
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170 new UserViewResponseMessage() { UserViewModel = this });
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171 }
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172 }
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173
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174 // in case user hasn't touched the form
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175 private void RefreshToViewErrors()
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176 {
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177 Username = _data.Username;
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178 Password = _data.Password;
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179 Email = _data.Email;
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180 DateOfBirth = _data.DateOfBirth;
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181 }
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182
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183 private void CancelCommandExecute(object obj)
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184 {
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185 Messenger.Default.Send<UserViewResponseMessage>(
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186 new UserViewResponseMessage() { UserViewModel = null });
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187 }
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188
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189 #endregion
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190
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191 private void ResetFormData()
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192 {
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193 SetProperties(_backup);
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194 ClearAllErrors();
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195 IsChanged = false;
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196 }
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197
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198 public bool IsChanged { get; private set; }
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199
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200 #region IEditableObject for datagrid
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201
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202 private bool inEdit;
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203 public void BeginEdit()
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204 {
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205 if (inEdit) return;
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206 inEdit = true;
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207 }
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208
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209 public void CancelEdit()
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210 {
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211 if (!inEdit) return;
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212 inEdit = false;
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213 ResetFormData();
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214 }
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215
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216 public void EndEdit()
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217 {
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218 if (!inEdit) return;
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219 }
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220
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221 #endregion
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222 }
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223 }