将最大项添加到ListBox以避免IndexOutOfRange

问题描述

我必须连续更改文件名，我用stringbuilder数组更改它们，将它们放在之前ListBox和AfterListBox中：虽然少于19项（height / itemHeight），但一切正常很好，如果没有足够的地方，我得到IndexOutOfRange异常



2.如果我想使用try-catch，我必须把它放在哪里？



我在Program.cs中遇到错误 Application.Run（new MainForm（））; 在 Main（）中，我是否必须在此处捕获异常，或者在方法Button_click中将项目添加到listBoxes？



我已经看到，如果你不知道该怎么做，你一定不能解决异常，但我想知道一个可视化的例子（不是msdn.com中使用控制台的那个）



提前致谢



我收到错误：

i have to change file names serially, i change them with a stringbuilder array, put them in a "before" ListBox and in a "After" ListBox: while there are less than 19 items (height/itemHeight), everything works fine, if there isn't enough place, i get IndexOutOfRange exception

2.in the case i want to use try-catch, where do i have to put it?

I get the error in Program.cs at line Application.Run(new MainForm()); in Main() , do i have to catch exceptions here, or in the method Button_click, that add items to listBoxes?

i've seen that if you don't know what to do, you mustn't cacth exception, but i wanted to know a visual example (not the one in msdn.com, that uses console)

Thanks in advance

I get the error here:

    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new MainForm());//error here
    }

here i work with listboxes
      
    for (int i = 0; i < songsnum; i++)
    {
        songListBef.Items.Add(Path.GetFileName(full_fname_ex[i]));
        fname_noex_b[i] = new StringBuilder(Path.GetFileNameWithoutExtension(full_fname_ex[i]));
        fname_noex_b[i].Remove(0, toRemove_bef);
        fname_noex_b[i].Remove(fname_noex_b[i].Length - toRemove_aft, toRemove_aft);
    }

...
    
    for (int i = 0; i < songsnum; i++)
    {
        fname_noex_b[i].Append(Path.GetExtension(full_fname_ex[i]));
        songListAft.Items.Add(fname_noex_b[i].ToString());
    }

推荐答案

for (int i = 0; i < songsnum - 1; i++)
{
    songListBef.Items.Add(Path.GetFileName(full_fname_ex[i]));
    fname_noex_b[i] = new StringBuilder(Path.GetFileNameWithoutExtension(full_fname_ex[i]));  
    fname_noex_b[i].Remove(0, toRemove_bef);
    fname_noex_b[i].Remove(fname_noex_b[i].Length - toRemove_aft, toRemove_aft);
}

...

...

for (int i = 0; i < songsnum - 1; i++)
{
    fname_noex_b[i].Append(Path.GetExtension(full_fname_ex[i]));
    songListAft.Items.Add(fname_noex_b[i].ToString());
}

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