从ListView获取SelectedItem [英] Get SelectedItem from ListView
本文介绍了从ListView获取SelectedItem的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
HI！我有ListView的问题。我无法获得我选择的价值。在我将Item作为类添加到ListView之前，我无法让一个selectedItem对它做一些事情。我展示了我的代码并且请...我是初学者：）
问题在于Select_dir（）..你能帮助我吗？ :(
public MainWindow（）
{
InitializeComponent（）;
var drives = DriveInfo.GetDrives（）;
foreach（驱动器中的DriveInfo目录）
{
Disc_1.Items.Add（dir.Name） ;
Disc_2.Items.Add（dir.Name）;
}
}
公共类文件
{
公共字符串名称{get; set;}
公共字符串类型{get; set;}
public long size {get; set;}
public DateTime date {get; set;}
}
public List< Files> myFile {get; set;}
private void select_path（object sender，SelectionChangedEventArgs e）
{
string path;
if（Disc_1.SelectedIndex> -1）
{
path = Disc_1.SelectedItem.ToString（）;
show_elements（path，Disc_1，lv_1）;
}
if（Disc_2.SelectedIndex> -1）
{
path = Disc_2.SelectedItem.ToString（）;
show_elements（path，Disc_2，lv_2）;
}
}
private void Select_dir（object sender，SelectionChangedEventArgs e）
{
if（lv_1.SelectedIndex> -1） ）
{
Files file = new Files（）;
file = lv_1.SelectedItem;
string n = file.name;
}
}
private void Show_elements（字符串d，ComboBox光盘，ListView lv ）
{
lv.Items.Clear（）;
string [] dirs = Directory.GetDirectories（d）;
string [] files = Directory.GetFiles（System.IO.Path.GetFullPath（d））;
foreach（dirs中的字符串目录）
{
disc.Items.Add（dir）;
文件dire = new Files（）;
var dir_ = new DirectoryInfo（dir）.Name;
var date_last = Directory.GetLastWriteTime（dir）;
dire.name = dir_;
dire.type =" dir" ;;
dire.date = date_last;
lv.Items.Add（dire）;
}
myFile = new List< Files>（）;
foreach（文件中的字符串f）
{
Files file = new Files（）;
file.name = System.IO.Path.GetFileNameWithoutExtension（f）;
file.type = System.IO.Path.GetExtension（f）;
file.size = new FileInfo（f）.Length;
file.date = new FileInfo（f）.LastWriteTime;
lv.Items.Add（file）;
}
}
}
< Grid>
< ListView SelectionChanged =" Select_dir"名称= QUOT; lv_1" ItemsSource =" {Binding myFile}"的HorizontalAlignment = QUOT;左"高度= QUOT; 218"余量= QUOT; 21,50,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 394">
< ListView.View>
< GridView>
< GridViewColumn DisplayMemberBinding =" {Binding name}"头= QUOT;姓名"宽度= QUOT; 140" />
< GridViewColumn DisplayMemberBinding =" {Binding type}"头= QUOT;典型值"宽度= QUOT; 50" />
< GridViewColumn DisplayMemberBinding =" {Binding size}"头= QUOT;尺寸"宽度= QUOT; 60 QUOT; />
< GridViewColumn DisplayMemberBinding =" {Binding date}"头= QUOT;日期"宽度= QUOT; 140" />
< / GridView>
< /ListView.View>
< / ListView>
< ListView SelectionChanged =" Select_dir"名称= QUOT; lv_2"的HorizontalAlignment = QUOT;左"高度= QUOT; 218"余量= QUOT; 500,50,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 377" RenderTransformOrigin = QUOT; 0.725,0.523">
< ListView.View>
< GridView>
< GridViewColumn DisplayMemberBinding =" {Binding name}"头= QUOT;姓名"宽度= QUOT; 140" />
< GridViewColumn DisplayMemberBinding =" {Binding type}"头= QUOT;典型值"宽度= QUOT; 50" />
< GridViewColumn DisplayMemberBinding =" {Binding size}"头= QUOT;尺寸"宽度= QUOT; 60 QUOT; />
< GridViewColumn DisplayMemberBinding =" {Binding date}"头= QUOT;日期"宽度= QUOT; 140" />
< / GridView>
< /ListView.View>
< / ListView>
< Button Content =" Open"的HorizontalAlignment = QUOT;左"余量= QUOT; 33,292,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 75" />
< Button Content ="复制"的HorizontalAlignment = QUOT;左"余量= QUOT; 248,292,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 75" />
< Button Content =" Move"的HorizontalAlignment = QUOT;左"余量= QUOT; 584,292,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 75" />
< Button Content ="删除"的HorizontalAlignment = QUOT;左"余量= QUOT; 788,292,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 75" RenderTransformOrigin = QUOT; 4.79,0.162" />
< ComboBox Name =" Disc_1"的SelectionChanged = QUOT; select_path"的HorizontalAlignment = QUOT;左"余量= QUOT; 33,10,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 184" />
< ComboBox Name =" Disc_2"的SelectionChanged = QUOT; select_path"的HorizontalAlignment = QUOT;左"余量= QUOT; 679,10,0,0" VerticalAlignment = QUOT;陀螺"宽度= QUOT; 184" RenderTransformOrigin = QUOT; 1.605,0.713" />
< / Grid>
解决方案
< blockquote>
你好BaNaw，
这个论坛讨论并提出有关C＃编程语言的问题，因为你的问题与WPF有关，我将把它移到WPF论坛寻求合适的支持。
感谢您的理解。
祝你好运，
张龙
HI! I Have a problem with ListView. I can't get value which I selected. Before I add Item as class to ListView and after i can't get one selectedItem to do something with it. I show my code and please.. I'm beginner :)
Problem is in Select_dir().. Can You help me? :(
public MainWindow()
{
InitializeComponent();
var drives = DriveInfo.GetDrives();
foreach (DriveInfo dir in drives)
{
Disc_1.Items.Add(dir.Name);
Disc_2.Items.Add(dir.Name);
}
}
public class Files
{
public string name { get; set; }
public string type { get; set; }
public long size { get; set; }
public DateTime date { get; set; }
}
public List<Files> myFile { get; set; }
private void select_path(object sender, SelectionChangedEventArgs e)
{
string path;
if ( Disc_1.SelectedIndex > -1)
{
path = Disc_1.SelectedItem.ToString();
show_elements(path, Disc_1, lv_1);
}
if (Disc_2.SelectedIndex > -1)
{
path = Disc_2.SelectedItem.ToString();
show_elements(path, Disc_2, lv_2);
}
}
private void Select_dir(object sender, SelectionChangedEventArgs e)
{
if(lv_1.SelectedIndex > -1)
{
Files file = new Files();
file = lv_1.SelectedItem;
string n = file.name;
}
}
private void Show_elements(string d, ComboBox disc , ListView lv )
{
lv.Items.Clear();
string[] dirs = Directory.GetDirectories(d);
string[] files = Directory.GetFiles(System.IO.Path.GetFullPath(d));
foreach (string dir in dirs)
{
disc.Items.Add(dir);
Files dire = new Files();
var dir_ = new DirectoryInfo(dir).Name;
var date_last = Directory.GetLastWriteTime(dir);
dire.name = dir_;
dire.type = "dir";
dire.date = date_last;
lv.Items.Add(dire);
}
myFile = new List<Files>();
foreach (string f in files)
{
Files file = new Files();
file.name = System.IO.Path.GetFileNameWithoutExtension(f);
file.type = System.IO.Path.GetExtension(f);
file.size = new FileInfo(f).Length;
file.date = new FileInfo(f).LastWriteTime;
lv.Items.Add(file);
}
}
}
<Grid>
<ListView SelectionChanged="Select_dir" Name="lv_1" ItemsSource="{Binding myFile}" HorizontalAlignment="Left" Height="218" Margin="21,50,0,0" VerticalAlignment="Top" Width="394">
<ListView.View>
<GridView>
<GridViewColumn DisplayMemberBinding="{Binding name}" Header="Name" Width="140"/>
<GridViewColumn DisplayMemberBinding="{Binding type}" Header="Typ" Width="50"/>
<GridViewColumn DisplayMemberBinding="{Binding size}" Header="Size" Width="60"/>
<GridViewColumn DisplayMemberBinding="{Binding date}" Header="Date" Width="140"/>
</GridView>
</ListView.View>
</ListView>
<ListView SelectionChanged="Select_dir" Name="lv_2" HorizontalAlignment="Left" Height="218" Margin="500,50,0,0" VerticalAlignment="Top" Width="377" RenderTransformOrigin="0.725,0.523">
<ListView.View>
<GridView>
<GridViewColumn DisplayMemberBinding="{Binding name}" Header="Name" Width="140"/>
<GridViewColumn DisplayMemberBinding="{Binding type}" Header="Typ" Width="50"/>
<GridViewColumn DisplayMemberBinding="{Binding size}" Header="Size" Width="60"/>
<GridViewColumn DisplayMemberBinding="{Binding date}" Header="Date" Width="140"/>
</GridView>
</ListView.View>
</ListView>
<Button Content="Open" HorizontalAlignment="Left" Margin="33,292,0,0" VerticalAlignment="Top" Width="75"/>
<Button Content="Copy" HorizontalAlignment="Left" Margin="248,292,0,0" VerticalAlignment="Top" Width="75"/>
<Button Content="Move" HorizontalAlignment="Left" Margin="584,292,0,0" VerticalAlignment="Top" Width="75"/>
<Button Content="Delete" HorizontalAlignment="Left" Margin="788,292,0,0" VerticalAlignment="Top" Width="75" RenderTransformOrigin="4.79,0.162"/>
<ComboBox Name="Disc_1" SelectionChanged="select_path" HorizontalAlignment="Left" Margin="33,10,0,0" VerticalAlignment="Top" Width="184"/>
<ComboBox Name="Disc_2" SelectionChanged="select_path" HorizontalAlignment="Left" Margin="679,10,0,0" VerticalAlignment="Top" Width="184" RenderTransformOrigin="1.605,0.713"/>
</Grid> 解决方案
Hi BaNaw,
This forum discuss and ask questions about the C# programming language, since your issue is more related to WPF, I will move it WPF forum for suitable support.
Thanks for your understanding.
Best regards,
Zhanglong
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