Mercurial > silverbladetech

annotate SilverlightValidation/SilverlightValidation.PL/ViewModels/UserViewModel.cs @ 121:8f94475d3146 tip

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final code
author stevenh7776
date Thu, 31 May 2012 15:35:26 +0100
parents 62477c2e8837
children
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.Models;
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9 using SilverlightValidation.Commands;
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10 using GalaSoft.MvvmLight.Messaging;
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11 using SilverlightValidation.Messages;
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12
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13 namespace SilverlightValidation.ViewModels
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14 {
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15 public class UserViewModel : ViewModelBase, IUserViewModel, IEditableObject
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16 {
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17 #region Fields
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18
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19 private readonly AbstractValidator<IUserModel> _validator;
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20 private UserModel _data;
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21 private UserModel _backup;
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22
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23 #endregion
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24
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25 #region Constructor
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26
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27 public UserViewModel(UserModel model, AbstractValidator<IUserModel> validator)
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28 {
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29 if (model == null) throw new ArgumentNullException("model");
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30 if (validator == null) throw new ArgumentNullException("validator");
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31
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32 _validator = validator;
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33 _data = model;
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34 _backup = model.Clone() as UserModel;
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36 OkCommand = new RelayCommand(OkCommandExecute);
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37 CancelCommand = new RelayCommand(CancelCommandExecute);
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38 }
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39
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40 #endregion
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41
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42 #region Methods
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43
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44 private void SetProperties(IUserModel source)
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45 {
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46 _data.Username = source.Username;
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47 _data.Password = source.Password;
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48 _data.Email = source.Email;
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49 _data.DateOfBirth = source.DateOfBirth;
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50 _data.Description = source.Description;
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51 }
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52
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53 #endregion
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54
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55 #region Properties
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56
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57 private const string UsernameProperty = "Username";
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58 public string Username
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59 {
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60 get { return _data.Username; }
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61 set
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62 {
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63 if (_data.Username != value)
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64 {
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65 _data.Username = value;
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66 RaisePropertyChanged(UsernameProperty);
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67 IsChanged = true;
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68 }
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69
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70 ClearError(UsernameProperty);
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71 var validationResult = _validator.Validate(this, UsernameProperty);
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72 if (!validationResult.IsValid)
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73 validationResult.Errors.ToList().ForEach(x => SetError(UsernameProperty, x.ErrorMessage));
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74 }
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75 }
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76
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77 private const string PasswordProperty = "Password";
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78 public string Password
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79 {
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80 get { return _data.Password; }
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81 set
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82 {
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83 if (_data.Password != value)
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84 {
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85 _data.Password = value;
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86 RaisePropertyChanged(PasswordProperty);
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87 IsChanged = true;
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88 }
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89
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90 ClearError(PasswordProperty);
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91 var validationResult = _validator.Validate(this, PasswordProperty);
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92 if (!validationResult.IsValid)
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93 validationResult.Errors.ToList().ForEach(x => SetError(PasswordProperty, x.ErrorMessage));
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94 }
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95 }
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96
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97 private const string EmailProperty = "Email";
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98 public string Email
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99 {
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100 get { return _data.Email; }
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101 set
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102 {
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103 if (_data.Email != value)
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104 {
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105 _data.Email = value;
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106 RaisePropertyChanged(EmailProperty);
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107 IsChanged = true;
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108 }
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109
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110 ClearError(EmailProperty);
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111 var validationResult = _validator.Validate(this, EmailProperty);
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112 if (!validationResult.IsValid)
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113 validationResult.Errors.ToList().ForEach(x => SetError(EmailProperty, x.ErrorMessage));
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114 }
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115 }
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116
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117 private const string DateOfBirthProperty = "DateOfBirth";
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118 public DateTime? DateOfBirth
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119 {
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120 get { return _data.DateOfBirth; }
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121 set
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122 {
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123 if (_data.DateOfBirth != value)
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124 {
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125 _data.DateOfBirth = value;
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126 RaisePropertyChanged(DateOfBirthProperty);
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127 IsChanged = true;
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128 }
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129
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130 ClearError(DateOfBirthProperty);
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131 var validationResult = _validator.Validate(this, DateOfBirthProperty);
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132 if (!validationResult.IsValid)
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133 validationResult.Errors.ToList().ForEach(x => SetError(DateOfBirthProperty, x.ErrorMessage));
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134 }
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135 }
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136
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137 private const string DescriptionProperty = "Description";
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138 public string Description
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139 {
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140 get { return _data.Description; }
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141 set
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142 {
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143 if (_data.Description != value)
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144 {
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145 _data.Description = value;
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146 RaisePropertyChanged(DescriptionProperty);
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147 IsChanged = true;
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148 }
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149
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150 ClearError(DescriptionProperty);
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151 var validationResult = _validator.Validate(this, DescriptionProperty);
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152 if (!validationResult.IsValid)
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153 validationResult.Errors.ToList().ForEach(x => SetError(DescriptionProperty, x.ErrorMessage));
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154 }
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155 }
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156
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157 #endregion
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158
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159 #region Commands
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160
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161 public ICommand OkCommand { get; set; }
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162 public ICommand CancelCommand { get; set; }
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163
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164 private void OkCommandExecute(object obj)
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165 {
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166 RefreshToViewErrors();
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167
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168 if (IsChanged && !HasErrors)
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169 {
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170 // save here
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171 Messenger.Default.Send(new UserViewResponseMessage() { UserViewModel = this });
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172 }
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173 }
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174
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175 // in case user hasn't touched the form
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176 private void RefreshToViewErrors()
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177 {
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178 Username = _data.Username;
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179 Password = _data.Password;
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180 Email = _data.Email;
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181 DateOfBirth = _data.DateOfBirth;
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182 }
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183
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184 private void CancelCommandExecute(object obj)
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185 {
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186 Messenger.Default.Send(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 }