如何在比较某些字符串后检查 listView 项目？

发布于 2024-12-03 03:48:50 字数 910 浏览 1 评论 0原文

谁能帮我解决一下我的小烦恼吗？我正在编写一个应用程序来处理文本文件。我有一个 GUI，其中包含一个 listView，其中每个项目都有复选框。我创建了 2 个数组：第一个用于 listView 中的项目，第二个用于文本文件中的所有行

   string[] itemInList = new string[] { listView1.Items.ToString()
   string[] lineInHosts = File.ReadAllLines(C:\Test.txt).ToArray<string>();

这个想法是比较“C:\Test.txt”文件中的所有行和 listView 中的所有项目。如果有匹配项，我希望该项目为 item.Checked = true;

PS：我已经尝试过此操作 -

        foreach (var item in itemInList)
        {
            foreach (var l in lineInHosts)
            {
                string itemName;
                ListViewItem foundItem;
                if (item == l)
                {
                    itemName = item.ToString();
                    foundItem = listView1.FindItemWithText(itemName);
                    foundItem.Checked = true;
                }
            }
        }

但它不起作用。

原文

Can anyone help me to solve my little trouble?
I'm writing an app to work with text files. And I have GUI which contains a listView with checkboxes for each item.
I've created 2 arrays:
1st for items in listView and 2nd for all lines in a text file

   string[] itemInList = new string[] { listView1.Items.ToString()
   string[] lineInHosts = File.ReadAllLines(C:\Test.txt).ToArray<string>();

The idea is to compare all lines in "C:\Test.txt" file and all items in the listView.
If there will be a match, I want this item to be item.Checked = true;

PS: I've tried this -

        foreach (var item in itemInList)
        {
            foreach (var l in lineInHosts)
            {
                string itemName;
                ListViewItem foundItem;
                if (item == l)
                {
                    itemName = item.ToString();
                    foundItem = listView1.FindItemWithText(itemName);
                    foundItem.Checked = true;
                }
            }
        }

but it doesn't work.

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亣腦蒛氧 2024-12-10 03:48:50

第一行应该不同，第二个循环效率不高：

string[] itemInList =  listView1.Items.OfType<ListViewItem>( ).Select( p => p.Text ).ToArray( );
string[] lineInHosts = File.ReadAllLines( @"C:\Test.txt" ).ToArray<string>( );

string itemName;
ListViewItem foundItem;

foreach ( var item in itemInList )
{
     if (lineInHosts.Contains(item))
     {
         itemName = item.ToString( );
         foundItem = listView1.FindItemWithText( itemName );
         foundItem.Checked = true;                    
     }
}

First line should be different and the second loop is not efficient:

string[] itemInList =  listView1.Items.OfType<ListViewItem>( ).Select( p => p.Text ).ToArray( );
string[] lineInHosts = File.ReadAllLines( @"C:\Test.txt" ).ToArray<string>( );

string itemName;
ListViewItem foundItem;

foreach ( var item in itemInList )
{
     if (lineInHosts.Contains(item))
     {
         itemName = item.ToString( );
         foundItem = listView1.FindItemWithText( itemName );
         foundItem.Checked = true;                    
     }
}

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迷迭香的记忆 2024-12-10 03:48:50

这一行看起来很可疑:)

 string[] itemInList = new string[] { listView1.Items.ToString()

itemInList 中只有一项，并且它会像您的类型一样被调用。
而是使用：

string[] itemInList = listView1.Items.Select(x => x.ToString()).ToArray();

This line looks suspicious :)

 string[] itemInList = new string[] { listView1.Items.ToString()

There will be only one item in itemInList, and it will be called like your type.
Instead use:

string[] itemInList = listView1.Items.Select(x => x.ToString()).ToArray();

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说谎友 2024-12-10 03:48:50

尝试下面的答案，希望它能节省某人的时间

    foreach (var room in customerRooms)
{
 lstViewRooms.Items.Cast<ListViewItem>().Where(x =>.Text.Contains(room.Room.ToString())).FirstOrDefault().Selected = true;
}

Try below answer, hope it will save someone's time

    foreach (var room in customerRooms)
{
 lstViewRooms.Items.Cast<ListViewItem>().Where(x =>.Text.Contains(room.Room.ToString())).FirstOrDefault().Selected = true;
}

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