如何删除列表框中的所选项目 [英] how to delete selected item in listbox

问题描述

public void DeleteSelectedList(ListBox LstDelete,string path)
        {
            int i = 0;
            ftp1 = new FTPOperations();
            int s = LstDelete.Items.Count;
            for (i = 0; i< LstDelete.Items.Count; i++)
            {
                if (LstDelete.Items[i].Selected)
                {
                    ftp1.DeleteFTP(path + LstDelete.Items[i].Text);
                    LstDelete.Items.Remove(LstDelete.Items[i].Text);

                }
            }

        }

我在列表框中选择了4个项目，但它仅删除了列表框中的3个项目，可以检查上面的代码是否正确..请...

i have selected 4 items in the list box but it deleting only 3 items in the list box can check the above code is correct are not..please...

推荐答案

像这样尝试..

try like this,..

public void DeleteSelectedList(ListBox LstDelete,string path)
        {
            int i = 0;
            ftp1 = new FTPOperations();
            int s = LstDelete.Items.Count;
            for (i = 0; i< LstDelete.Items.Count; i++)
            {
                if (LstDelete.Items[i].Selected)
                {
                    ftp1.DeleteFTP(path + LstDelete.Items[i].Text);
                    LstDelete.Items.RemoveAt(i);
                    i--;
                }
                
            }

        }

希望它能工作

hope it works

我已经在列表框中选择了4个项目，但是它仅删除了列表框中的3个项目，可以检查上面的代码是否正确.
可能是这种情况，因为您正在循环从列表中删除项目.

为了获得最佳/确定的结果，我建议您跟踪要删除的ID.有了列表后，请删除所有列表.

现在，尝试:

i have selected 4 items in the list box but it deleting only 3 items in the list box can check the above code is correct are not..
This might be the case as you are deleting items from the list at the same time looping through it.

For best/confirm result, I would suggest you to keep a track of ID''s to be removed. Once you have a list then remove all of them.

For now, try:

for (i = 0; i< LstDelete.Items.Count; i++)
{
     if (LstDelete.Items[i].Selected)
     {
        ftp1.DeleteFTP(path + LstDelete.Items[i].Text);
        LstDelete.Items.RemoveAt(i);
        --i;  //This will reset your counter back to same position and let item moved up the list get checked which is getting missed in your code
     }
}

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