Mercurial > silverbladetech

annotate delete me/SilverlightValidation/ViewModels/UserViewModel.cs @ 73:d06c852e0167

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author Steven Hollidge <stevenhollidge@hotmail.com>
date Mon, 23 Apr 2012 19:15:52 +0100
parents 3591c26bd63e
children
rev   line source
59
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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
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12 namespace SilverlightValidation.ViewModels
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13 {
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14 public class UserViewModel : ViewModelBase, IUserModel, IChangeTracking, IEditableObject
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15 {
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16 #region Fields
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17
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18 private readonly UserModelValidator _validator;
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19 private UserModel _data;
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20 private UserModel _backup;
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21
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22 #endregion
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23
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24 #region Constructor
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25
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26 public UserViewModel(UserModel model, UserModelValidator validator)
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27 {
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28 _validator = validator;
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29 _data = model;
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30 _backup = model.Clone();
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31
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32 OkCommand = new RelayCommand(OkCommandExecute);
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33 CancelCommand = new RelayCommand(CancelCommandExecute);
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34 }
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35
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36 #endregion
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37
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38 #region Methods
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39
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40 private void SetProperties(IUserModel source)
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41 {
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42 Username = source.Username;
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43 Password = source.Password;
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44 Email = source.Email;
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45 DateOfBirth = source.DateOfBirth;
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46 Description = source.Description;
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47 }
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48
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49 #endregion
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50
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51 #region Properties
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52
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53 private const string UsernameProperty = "Username";
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54 public string Username
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55 {
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56 get { return _data.Username; }
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57 set
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58 {
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59 if (_data.Username != value)
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60 {
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61 _data.Username = value;
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62 RaisePropertyChanged(UsernameProperty);
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63 IsChanged = true;
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64 }
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65
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66 ClearError(UsernameProperty);
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67 var validationResult = _validator.Validate(this, UsernameProperty);
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68 if (!validationResult.IsValid)
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69 validationResult.Errors.ToList().ForEach(x => SetError(UsernameProperty, x.ErrorMessage));
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70 }
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71 }
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72
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73 private const string PasswordProperty = "Password";
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74 public string Password
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75 {
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76 get { return _data.Password; }
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77 set
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78 {
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79 if (_data.Password != value)
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80 {
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81 _data.Password = value;
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82 RaisePropertyChanged(PasswordProperty);
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83 IsChanged = true;
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84 }
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85
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86 ClearError(PasswordProperty);
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87 var validationResult = _validator.Validate(this, PasswordProperty);
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88 if (!validationResult.IsValid)
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89 validationResult.Errors.ToList().ForEach(x => SetError(PasswordProperty, x.ErrorMessage));
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90 }
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91 }
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92
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93 private const string EmailProperty = "Email";
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94 public string Email
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95 {
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96 get { return _data.Email; }
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97 set
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98 {
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99 if (_data.Email != value)
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100 {
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101 _data.Email = value;
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102 RaisePropertyChanged(EmailProperty);
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103 IsChanged = true;
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104 }
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105
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106 ClearError(EmailProperty);
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107 var validationResult = _validator.Validate(this, EmailProperty);
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108 if (!validationResult.IsValid)
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109 validationResult.Errors.ToList().ForEach(x => SetError(EmailProperty, x.ErrorMessage));
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110 }
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111 }
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112
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113 private const string DateOfBirthProperty = "DateOfBirth";
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114 public DateTime? DateOfBirth
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115 {
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116 get { return _data.DateOfBirth; }
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117 set
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118 {
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119 if (_data.DateOfBirth != value)
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120 {
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121 _data.DateOfBirth = value;
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122 RaisePropertyChanged(DateOfBirthProperty);
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123 IsChanged = true;
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124 }
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125
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126 ClearError(DateOfBirthProperty);
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127 var validationResult = _validator.Validate(this, DateOfBirthProperty);
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128 if (!validationResult.IsValid)
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129 validationResult.Errors.ToList().ForEach(x => SetError(DateOfBirthProperty, x.ErrorMessage));
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130 }
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131 }
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132
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133 private const string DescriptionProperty = "Description";
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134 public string Description
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135 {
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136 get { return _data.Description; }
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137 set
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138 {
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139 if (_data.Description != value)
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140 {
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141 _data.Description = value;
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142 RaisePropertyChanged(DescriptionProperty);
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143 IsChanged = true;
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144 }
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145
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146 ClearError(DescriptionProperty);
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147 var validationResult = _validator.Validate(this, DescriptionProperty);
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148 if (!validationResult.IsValid)
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149 validationResult.Errors.ToList().ForEach(x => SetError(DescriptionProperty, x.ErrorMessage));
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150 }
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151 }
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152
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153 #endregion
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154
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155 #region Commands
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156
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157 public ICommand OkCommand { get; set; }
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158 public ICommand CancelCommand { get; set; }
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159
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160 private void OkCommandExecute(object obj)
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161 {
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162 SetProperties(_data);
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163
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164 if (IsChanged && !HasErrors)
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165 {
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166 AcceptChanges();
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167 }
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168 }
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169
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170 private void CancelCommandExecute(object obj)
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171 {
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172 CancelChanges();
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173 }
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174
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175 #endregion
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176
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177 #region IChangeTrack plus Cancel
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178
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179 public void AcceptChanges()
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180 {
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181 MessageBox.Show("Saving...");
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182 SetProperties(_backup);
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183
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184 ClearAllErrors();
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185 IsChanged = false;
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186 }
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187
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188 public void CancelChanges()
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189 {
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190 if (!IsChanged) return;
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191 SetProperties(_backup);
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192 ClearAllErrors();
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193 IsChanged = false;
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194 }
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195
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196 public bool IsChanged { get; private set; }
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197
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198 #endregion
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199
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200 #region
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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 SetProperties(_backup);
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208 }
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209
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210 public void CancelEdit()
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211 {
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212 if (!inEdit) return;
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213 inEdit = false;
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214 CancelChanges();
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215 }
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216
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217 public void EndEdit()
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218 {
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219 if (!inEdit) return;
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220 inEdit = false;
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221 SetProperties(_backup);
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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 }
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227 }