C# WPF MVVM如何使用ShowDialog（）上的绑定预填充文本框？
我有一个用C# WPF MVVM如何使用ShowDialog（）上的绑定预填充文本框？,c#,wpf,mvvm,dialog,C#,Wpf,Mvvm,Dialog,我有一个用ShowDialog（）显示的窗体窗口，文本框绑定到视图模型中的属性。 我按如下方式打开对话框（简化版）： 我在表单中设置的属性用作过滤器参数，我将其存储在一个静态类中以供以后使用 我想做的是让文本框自动填充这个静态类中存储的当前值 我的文本框绑定属性如下所示： private string _product; public string product { get { return _product; } set
ShowDialog（） private string _product;
public string product
{
get { return _product; }
set
{
if (_product == value)
return;
_product = value;
Helper.product = value;
if (value != "")
chkProduct = true;
OnPropertyChanged();
}
}
ShowDialog（）ShowDialog（）对话框resultwnd.Show（）<Window x:Class="LicenseManager.View.FilterWindowView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:LicenseManager.View"
mc:Ignorable="d"
Title="FilterWindowView" Height="306.412" Width="284.216">
<Grid>
<CheckBox Content="Product" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" IsChecked="{Binding chkProduct}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,8,0,0" TextWrapping="Wrap" Text="{Binding product, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Client" HorizontalAlignment="Left" Margin="10,38,0,0" VerticalAlignment="Top" IsChecked="{Binding chkClient}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,36,0,0" TextWrapping="Wrap" Text="{Binding client, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Date After" HorizontalAlignment="Left" Margin="10,66,0,0" VerticalAlignment="Top" IsChecked="{Binding chkDateAfter}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,64,0,0" TextWrapping="Wrap" Text="{Binding dateAfter, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Date Before" HorizontalAlignment="Left" Margin="10,94,0,0" VerticalAlignment="Top" IsChecked="{Binding chkDateBefore}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,92,0,0" TextWrapping="Wrap" Text="{Binding dateBefore, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Sbs__no" HorizontalAlignment="Left" Margin="10,122,0,0" VerticalAlignment="Top" IsChecked="{Binding chkSbsNo}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,120,0,0" TextWrapping="Wrap" Text="{Binding sbsNo, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Store__no" HorizontalAlignment="Left" Margin="10,150,0,0" VerticalAlignment="Top" IsChecked="{Binding chkStoreNo}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,148,0,0" TextWrapping="Wrap" Text="{Binding storeNo, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Workstation__no" HorizontalAlignment="Left" Margin="10,178,0,0" VerticalAlignment="Top" IsChecked="{Binding chkWorkstationNo}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,176,0,0" TextWrapping="Wrap" Text="{Binding workstationNo, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<CheckBox Content="Comment" HorizontalAlignment="Left" Margin="10,206,0,0" VerticalAlignment="Top" IsChecked="{Binding chkWorkstationNo}"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="137,204,0,0" TextWrapping="Wrap" Text="{Binding comment, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
<Button Content="Apply" Command="{Binding apply}" HorizontalAlignment="Left" Margin="10,236,0,0" VerticalAlignment="Top" Width="75"/>
</Grid>
class FilterWindowViewModel : INotifyPropertyChanged
{
#region Attributes
public Window wnd; // For dialog closer
public List<LicenseRecordModel> list;
public List<LicenseRecordModel> dialogResult;
public event PropertyChangedEventHandler PropertyChanged;
string tmpProduct;
string tmpClient;
string tmpDateAfter;
string tmpDateBefore;
string tmpSbsNo;
string tmpStoreNo;
string tmpWorkstationNo;
string tmpComment;
#endregion
#region Properties
//Properties and commands
private string _comment;
public string comment
{
get { return _comment; }
set
{
if (_comment == value)
return;
_comment = value;
Helper.comment = value;
if (value != "")
chkComment = true;
OnPropertyChanged();
}
}
//...
private DelegateCommand _apply;
public DelegateCommand apply
{
get
{
return _apply ?? (_apply = new DelegateCommand(o => Apply(), o => true));
}
}
#endregion
#region Init
public FilterWindowViewModel(IEnumerable<LicenseRecordModel> source)
{
tmpProduct = Helper.product;
tmpClient = Helper.client;
tmpDateAfter = Helper.dateAfter;
tmpDateBefore= Helper.dateBefore;
tmpSbsNo = Helper.sbsNo;
tmpStoreNo = Helper.storeNo;
tmpWorkstationNo = Helper.workstationNo;
tmpComment = Helper.comment;
list = new List<LicenseRecordModel>(source);
}
public void RestoreCurrentFilters()
{
product = tmpProduct;
client = tmpClient;
dateAfter = tmpDateAfter;
dateBefore = tmpDateBefore;
sbsNo = tmpSbsNo;
storeNo = tmpStoreNo;
workstationNo = tmpWorkstationNo;
comment = tmpComment;
}
protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
private bool Accept(LicenseRecordModel lic)
{
var tmp = list;
tmp = list.Where(x =>
chkProduct ? x.Product.Contains(product) : true &&
chkClient ? x.Client.Contains(client) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true
).ToList();
return false;
}
#region Commands
public void Apply()
{
var tmp = new List<LicenseRecordModel>(list);
dialogResult = new List<LicenseRecordModel>(list);
string message = "";
if (chkProduct)
{
dialogResult =tmp.Where(x => x.Product.Contains(product.ToUpper())).ToList();
tmp = dialogResult;
}
if (chkClient)
{
dialogResult = tmp.Where(x => x.Client.Contains(client.ToUpper())).ToList();
tmp = dialogResult;
}
if (chkDateAfter)
{
DateTime after;
if (chkDateBefore)
{
DateTime before;
if (DateTime.TryParse(dateAfter, out after))
{
if (DateTime.TryParse(dateBefore, out before))
{
dialogResult = tmp.Where(x => DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) <= after && DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) >= before).ToList(); ;
tmp = dialogResult;
}
else message += "'Date Before' is not a valid date (yyyy-mm-dd)";
}
else message += "'Date After' is not a valid date (yyyy-mm-dd)";
}
else if (DateTime.TryParse(dateAfter, out after))
{
dialogResult = tmp.Where(x => DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) >= after).ToList();
tmp = dialogResult;
}
else message += "'Date After' is not a valid date (yyyy-mm-dd)";
}
if (chkDateBefore)
{
DateTime before;
if (DateTime.TryParse(dateBefore, out before))
{
dialogResult = tmp.Where(x => DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) <= before).ToList();
tmp = dialogResult;
}
else message += "'Date After' is not a valid date (yyyy-mm-dd)";
}
if (chkSbsNo)
{
dialogResult = tmp.Where(x => x.SbsNo.Contains(sbsNo)).ToList();
tmp = dialogResult;
}
if (chkStoreNo)
{
dialogResult = tmp.Where(x => x.StoreNo.Contains(storeNo)).ToList();
tmp = dialogResult;
}
if (chkWorkstationNo)
{
dialogResult = tmp.Where(x => x.WorkstationNo.Contains(workstationNo)).ToList();
tmp = dialogResult;
}
if (chkComment)
{
dialogResult = tmp.Where(x => x.Comment.ToUpper().Contains(comment.ToUpper())).ToList();
tmp = dialogResult;
}
if (message != "")
{
MessageBox.Show(message);
}
else
{
DialogCloser.SetDialogResult(wnd, true);
}
}
#endregion
}
class FilterWindowViewModel:INotifyPropertyChanged
{
#区域属性
公共窗口wnd；//用于关闭对话框
公开名单；
公开列表结果；
公共事件属性更改事件处理程序属性更改；
字符串tmpProduct；
字符串tmpClient；
字符串tmpDateAfter；
字符串tmpDateBefore；
字符串tmpSbsNo；
字符串tmpStoreNo；
字符串tmpWorkstationNo；
字符串TMP命令；
#端区
#区域属性
//属性和命令
私有字符串\u注释；
公共字符串注释
{
获取{return\u comment；}
设置
{
如果（_comment==值）
返回；
_评论=价值；
Helper.comment=值；
如果（值！=“”）
chkComment=true；
OnPropertyChanged（）；
}
}
//...
专用授权命令(u apply);；
公共委托人命令应用
{
得到
{
返回_apply？？（_apply=newdelegateCommand（o=>apply（），o=>true））；
}
}
#端区
#区域初始化
公共筛选器Windows视图模型（IEnumerable源）
{
tmpProduct=Helper.product；
tmpClient=Helper.client；
tmpDateAfter=Helper.dateAfter；
tmpDateBefore=Helper.dateBefore；
tmpSbsNo=Helper.sbsNo；
tmpStoreNo=Helper.storeNo；
tmpWorkstationNo=Helper.workstationNo；
tmpComment=Helper.comment；
列表=新列表（源）；
}
公共无效恢复筛选器（）
{
产品=tmpProduct；
客户=TMP客户；
dateAfter=tmpDateAfter；
dateBefore=tmpDateBefore；
sbsNo=tmpSbsNo；
storeNo=tmpStoreNo；
工作站编号=TMP工作站编号；
评论=TMP评论；
}
受保护的OnPropertyChanged无效（[CallerMemberName]字符串propertyName=null）
{
PropertyChangedEventHandler处理程序=PropertyChanged；
if（处理程序！=null）
{
处理程序（这是新的PropertyChangedEventArgs（propertyName））；
}
}
#端区
private bool Accept（LicenseRecordModel lic）
{
var tmp=列表；
tmp=列表。其中（x=>
chkProduct？x.Product.Contains（产品）：true&&
chkClient？x.Client.Contains（客户端）：true&&
chkProduct？x.Product.Contains（产品）：true&&
chkProduct？x.Product.Contains（产品）：true&&
chkProduct？x.Product.Contains（产品）：true&&
chkProduct？x.Product.Contains（产品）：true&&
chkProduct？x.Product.Contains（产品）：true
).ToList（）；
返回false；
}
#区域命令
公开无效申请（）
{
var tmp=新列表（列表）；
dialogResult=新列表（列表）；
字符串消息=”；
if（chkProduct）
{
dialogResult=tmp.Where（x=>x.Product.Contains（Product.ToUpper（））.ToList（）；
tmp=对话结果；
}
if（chkClient）
{
dialogResult=tmp.Where（x=>x.Client.Contains（Client.ToUpper（））.ToList（）；
tmp=对话结果；
}
if（chkDateAfter）
{
日期时间之后；
if（chkDateBefore）
{
日期时间；
if（DateTime.TryParse（dateAfter，out after））
{
if（DateTime.TryParse（dateBefore，out before））
{
dialogResult=tmp.Where（x=>DateTime.ParseExact（x.CreationDate，“yyyy-MM-dd”，null）=before.ToList（）；
tmp=对话结果；
}
class FilterWindowViewModel : INotifyPropertyChanged
{
#region Attributes
public Window wnd; // For dialog closer
public List<LicenseRecordModel> list;
public List<LicenseRecordModel> dialogResult;
public event PropertyChangedEventHandler PropertyChanged;
string tmpProduct;
string tmpClient;
string tmpDateAfter;
string tmpDateBefore;
string tmpSbsNo;
string tmpStoreNo;
string tmpWorkstationNo;
string tmpComment;
#endregion
#region Properties
//Properties and commands
private string _comment;
public string comment
{
get { return _comment; }
set
{
if (_comment == value)
return;
_comment = value;
Helper.comment = value;
if (value != "")
chkComment = true;
OnPropertyChanged();
}
}
//...
private DelegateCommand _apply;
public DelegateCommand apply
{
get
{
return _apply ?? (_apply = new DelegateCommand(o => Apply(), o => true));
}
}
#endregion
#region Init
public FilterWindowViewModel(IEnumerable<LicenseRecordModel> source)
{
tmpProduct = Helper.product;
tmpClient = Helper.client;
tmpDateAfter = Helper.dateAfter;
tmpDateBefore= Helper.dateBefore;
tmpSbsNo = Helper.sbsNo;
tmpStoreNo = Helper.storeNo;
tmpWorkstationNo = Helper.workstationNo;
tmpComment = Helper.comment;
list = new List<LicenseRecordModel>(source);
}
public void RestoreCurrentFilters()
{
product = tmpProduct;
client = tmpClient;
dateAfter = tmpDateAfter;
dateBefore = tmpDateBefore;
sbsNo = tmpSbsNo;
storeNo = tmpStoreNo;
workstationNo = tmpWorkstationNo;
comment = tmpComment;
}
protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
private bool Accept(LicenseRecordModel lic)
{
var tmp = list;
tmp = list.Where(x =>
chkProduct ? x.Product.Contains(product) : true &&
chkClient ? x.Client.Contains(client) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true &&
chkProduct ? x.Product.Contains(product) : true
).ToList();
return false;
}
#region Commands
public void Apply()
{
var tmp = new List<LicenseRecordModel>(list);
dialogResult = new List<LicenseRecordModel>(list);
string message = "";
if (chkProduct)
{
dialogResult =tmp.Where(x => x.Product.Contains(product.ToUpper())).ToList();
tmp = dialogResult;
}
if (chkClient)
{
dialogResult = tmp.Where(x => x.Client.Contains(client.ToUpper())).ToList();
tmp = dialogResult;
}
if (chkDateAfter)
{
DateTime after;
if (chkDateBefore)
{
DateTime before;
if (DateTime.TryParse(dateAfter, out after))
{
if (DateTime.TryParse(dateBefore, out before))
{
dialogResult = tmp.Where(x => DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) <= after && DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) >= before).ToList(); ;
tmp = dialogResult;
}
else message += "'Date Before' is not a valid date (yyyy-mm-dd)";
}
else message += "'Date After' is not a valid date (yyyy-mm-dd)";
}
else if (DateTime.TryParse(dateAfter, out after))
{
dialogResult = tmp.Where(x => DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) >= after).ToList();
tmp = dialogResult;
}
else message += "'Date After' is not a valid date (yyyy-mm-dd)";
}
if (chkDateBefore)
{
DateTime before;
if (DateTime.TryParse(dateBefore, out before))
{
dialogResult = tmp.Where(x => DateTime.ParseExact(x.CreationDate, "yyyy-MM-dd", null) <= before).ToList();
tmp = dialogResult;
}
else message += "'Date After' is not a valid date (yyyy-mm-dd)";
}
if (chkSbsNo)
{
dialogResult = tmp.Where(x => x.SbsNo.Contains(sbsNo)).ToList();
tmp = dialogResult;
}
if (chkStoreNo)
{
dialogResult = tmp.Where(x => x.StoreNo.Contains(storeNo)).ToList();
tmp = dialogResult;
}
if (chkWorkstationNo)
{
dialogResult = tmp.Where(x => x.WorkstationNo.Contains(workstationNo)).ToList();
tmp = dialogResult;
}
if (chkComment)
{
dialogResult = tmp.Where(x => x.Comment.ToUpper().Contains(comment.ToUpper())).ToList();
tmp = dialogResult;
}
if (message != "")
{
MessageBox.Show(message);
}
else
{
DialogCloser.SetDialogResult(wnd, true);
}
}
#endregion
}
<TextBox Text="{Binding product, UpdateSourceTrigger=PropertyChanged}" />
public partial class MainWindow
{
// Shared and reused view model instance
private FilterWindowViewModel DialogViewModel{ get; set; }
public MainWindow()
{
this.DialogViewModel = new FilterWindowViewModel();
}
private void ShowDialog()
{
var dialog = new FilterWindowView() { DataContext = this.DialogViewModel };
if (dialog.ShowDialog() ?? false)
{
//...
}
}
}
public class FilterWindowViewModel
{
private string _product;
public string Product
{
get => _product;
set
{
if (_product == value)
return;
_product = value;
this.chkProduct = !string.IsNullOrWhiteSpace(value);
OnPropertyChanged();
}
}
}