C# 选中或取消选中菜单项时隐藏/显示gridview列
我想在单击菜单项时隐藏栅格视图列 Xaml:C# 选中或取消选中菜单项时隐藏/显示gridview列,c#,wpf,mvvm,C#,Wpf,Mvvm,我想在单击菜单项时隐藏栅格视图列 Xaml: 菜单项标题与网格视图列标题相同。选中或取消选中菜单项时,我希望显示或隐藏“栅格视图”列 我有一个类似于这里的GidViewColumnVisibilityManager。 视图模型: public MyViewModel() { MyListItems = SomeClass.instance.messages; _MenuItems = new ObservableCollection<M
菜单项标题与网格视图列标题相同。选中或取消选中菜单项时,我希望显示或隐藏“栅格视图”列
我有一个类似于这里的GidViewColumnVisibilityManager。
视图模型:
public MyViewModel()
{
MyListItems = SomeClass.instance.messages;
_MenuItems = new ObservableCollection<MenuClass>();
//populates the view menu
PopulateViewMenu();
this.Columns = new ObservableCollection<ColumnDescriptor>
{
new ColumnDescriptor{ Width = 40, HeaderText ="column1", DisplayMember= "column1"},
new ColumnDescriptor{ Width = 40, HeaderText="column2" , DisplayMember= "column2"},
new ColumnDescriptor{ Width = 70, HeaderText="column3" , DisplayMember="column3"},
};
//event to command
CheckedViewMenuItemsCmd = new RelayCommand<MenuClass>(CheckedViewMenuItems);
}
public ObservableCollection<ColumnDescriptor> Columns { get; private set; }
private ICommand _addColumnCommand;
public ICommand AddColumnCommand
{
get
{
if (_addColumnCommand == null)
{
_addColumnCommand = new RelayCommand<string>(
s =>
{
this.Columns.Add(new ColumnDescriptor { HeaderText = s, DisplayMember = s });
});
}
return _addColumnCommand;
}
}
private ICommand _removeColumnCommand;
public ICommand RemoveColumnCommand
{
get
{
if (_removeColumnCommand == null)
{
_removeColumnCommand = new RelayCommand<string>(
s =>
{
this.Columns.Remove(this.Columns.FirstOrDefault(d => d.DisplayMember == s));
});
}
return _removeColumnCommand;
}
}
private void CheckedViewMenuItems(MenuClass m)
{
try
{
bool IsChecked = m.IsChecked;
if (IsChecked)
{
ColumnDescriptor cl1 = new ColumnDescriptor{ Width = 40, HeaderText =m.Header, DisplayMember= "Revision"};
int idx = Convert.ToInt32(m.Tag);
int insertidx = Math.Min(idx, this.Columns.Count);
this.Columns.Insert(insertidx, cl1);
}
else
{
foreach (var item in this.Columns)
{
if (item.HeaderText == m.Header)
{
// item.DisplayMember = "";
this.Columns.Remove(item);
break;
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(String.Format("{0}{1}{2}{1}{3}", ex.GetType().ToString(), Environment.NewLine, ex.Message, ex.StackTrace));
}
}
publicMyViewModel()
{
MyListItems=SomeClass.instance.messages;
_MenuItems=新的ObservableCollection();
//填充“视图”菜单
PopulateViewMenu();
this.Columns=新的ObservableCollection
{
新的列描述符{Width=40,HeaderText=“column1”,DisplayMember=“column1”},
新的列描述符{Width=40,HeaderText=“column2”,DisplayMember=“column2”},
新的列描述符{Width=70,HeaderText=“column3”,DisplayMember=“column3”},
};
//事件到命令
CheckedViewMenuItemsCmd=新的中继命令(CheckedViewMenuItems);
}
公共ObservableCollection列{get;private set;}
专用ICommand_addColumn命令;
公共ICommand addColumn命令
{
得到
{
如果(_addColumnCommand==null)
{
_addColumnCommand=newrelayCommand(
s=>
{
Add(新的ColumnDescriptor{HeaderText=s,DisplayMember=s});
});
}
返回_addcolumn命令;
}
}
私有ICommand_removeColumn命令;
公共ICommand removeColumn命令
{
得到
{
if(_removeColumnCommand==null)
{
_removeColumnCommand=newrelaycommand(
s=>
{
this.Columns.Remove(this.Columns.FirstOrDefault(d=>d.DisplayMember==s));
});
}
return\u removeColumn命令;
}
}
私有void CheckedViewMenuItems(菜单类m)
{
尝试
{
bool IsChecked=m.IsChecked;
如果(已检查)
{
ColumnDescriptor cl1=新的ColumnDescriptor{Width=40,HeaderText=m.Header,DisplayMember=“Revision”};
int idx=转换为32(m.Tag);
int insertidx=Math.Min(idx,this.Columns.Count);
this.Columns.Insert(insertidx,cl1);
}
其他的
{
foreach(此.Columns中的变量项)
{
if(item.HeaderText==m.Header)
{
//item.DisplayMember=“”;
此.Columns.Remove(项);
打破
}
}
}
}
捕获(例外情况除外)
{
Debug.WriteLine(String.Format(“{0}{1}{2}{1}{3}”),例如GetType().ToString(),Environment.NewLine,例如Message,例如StackTrace));
}
}
对于如何使用booleon-to-visible转换器并实现该功能,我有点困惑。谢谢你的帮助。如果你有问题,请问我。谢谢各位。
我尝试了插入和删除,而不是显示和隐藏,删除就像一个符咒,但插入需要一个显示成员绑定绑定到集合的每一次,这是显而易见的。我试过一个专栏,效果很好,我需要它为所有人服务。有什么想法吗?我找到了解决办法。我有一个新函数GetdisplayMember,它根据单击的菜单项返回字符串。这里是解决办法。效果很好。干杯
private string GetDisplayMember(int tag)
{
string displayMember = string.Empty;
if (tag != null)
{
switch (tag)
{
case 0:
displayMember = "Revision";
break;
case 1:
displayMember = "Class";
break;
case 2:
displayMember = "Errordate";
break;
}
}
return displayMember;
}
private void CheckedViewMenuItems(MenuClass m)
{
try
{
if (m!=null)
{
bool IsChecked = m.IsChecked;
if (IsChecked)
{
ColumnDescriptor cl1 =new ColumnDescriptor
{
HeaderText =m.Header,
DisplayMember= GetDisplayMember(m.Tag)
};
int idx = Convert.ToInt32(m.Tag);
int insertidx = Math.Min(idx,
this.Columns.Count);
this.Columns.Insert(insertidx, cl1);
}
else
{
foreach (var item in this.Columns)
{
if (item.HeaderText == m.Header)
{
// item.DisplayMember = "";
this.Columns.Remove(item);
break;
}
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(String.Format("{0}{1}{2}{1}{3}", ex.GetType().ToString(), Environment.NewLine, ex.Message, ex.StackTrace));
ErrorLogger.Log(LogLevel.Error, ex.ToString());
}
非常感谢。是的,它们不应该有标签。很抱歉
private string GetDisplayMember(int tag)
{
string displayMember = string.Empty;
if (tag != null)
{
switch (tag)
{
case 0:
displayMember = "Revision";
break;
case 1:
displayMember = "Class";
break;
case 2:
displayMember = "Errordate";
break;
}
}
return displayMember;
}
private void CheckedViewMenuItems(MenuClass m)
{
try
{
if (m!=null)
{
bool IsChecked = m.IsChecked;
if (IsChecked)
{
ColumnDescriptor cl1 =new ColumnDescriptor
{
HeaderText =m.Header,
DisplayMember= GetDisplayMember(m.Tag)
};
int idx = Convert.ToInt32(m.Tag);
int insertidx = Math.Min(idx,
this.Columns.Count);
this.Columns.Insert(insertidx, cl1);
}
else
{
foreach (var item in this.Columns)
{
if (item.HeaderText == m.Header)
{
// item.DisplayMember = "";
this.Columns.Remove(item);
break;
}
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(String.Format("{0}{1}{2}{1}{3}", ex.GetType().ToString(), Environment.NewLine, ex.Message, ex.StackTrace));
ErrorLogger.Log(LogLevel.Error, ex.ToString());
}