在 Form1 构造函数中,我有:
if (System.IO.File.Exists(keywords_path_file))
{
ListBoxLoadKeys(LocalyKeyWords, keywords_path_file);
}
else
{
fileExist = new StreamWriter(keywords_path_file);
fileExist.Close();
ListBoxLoadKeys(LocalyKeyWords, keywords_path_file);
}
我使用断点并查看文件是否存在:
C:\Users\bout0_000\AppData\Local\GatherLinks\GatherLinks\Keywords\Keywords.txt
文件内容为:
http://www.walla.co.il,walla
http://www.cnet.com,cnet
http://rotter.net/forum/scoops1/29961.shtml,rotter
http://vanessawest.tripod.com/crimescenephotos.html,VanessaWest
http://rotter.net/forum/scoops1/45227.shtml,scoops
https://www.google.com/search?q=live+cameras,live camera
https://www.google.com/search?q=rape+images&oq=+images&aqs=chrome..69i57.1661j0&sourceid=chrome&ie=UTF-8,hi
https://www.google.com/search?q=+images&um=1&ie=UTF-8&hl=en&tbm=isch&source=og&sa=N&tab=wi&ei=GqotUv2kA4OftAae94DoAg&biw=951&bih=457&sei=oaotUtDqM8WbtAag3IFg#hl=en&q=+and+&tbm=isch&um=1,chud
http://www.test.com,test
该文件包含 9 个键和关键字。左侧是键,右侧是关键字。
然后它进入这个方法:
private void ListBoxLoadKeys(Dictionary<string, List<string>> dictionary, string FileName)
{
List<string> urls = new List<string>();
using (StreamReader sr = new StreamReader(FileName))
{
while ((line = sr.ReadLine()) != null)
{
int i = line.Count();
tokens = line.Split(',');
dictionary.Add(tokens[0], tokens.Skip(1).ToList());
data.Add("Url: " + tokens[0] + " --- " + "Localy KeyWord: " + tokens[1]);
urls.Add(tokens[0]);
}
}
listBox1.DataSource = data;
listBox1.Tag = urls;
}
在其下线时的方法中:listBox1.DataSource = data; 它的跳跃和做这个事件:
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (listBox1.SelectedItem != null)
{
label4.Text = listBox1.SelectedItem.ToString();
string startTag = "Url: ";
string endTag = " ---";
int startTagWidth = startTag.Length;
int endTagWidth = endTag.Length;
int index = 0;
index = label4.Text.IndexOf(startTag, index);
int start = index + startTagWidth;
index = label4.Text.IndexOf(endTag, start + 1);
string g = label4.Text.Substring(start, index - start);
label4.Text = g;
mainUrl = g;
}
}
最后我看到 data 和 listBox1.DataSource 都包含 9 个项目。
毕竟,程序正在运行。我在 listBox 的右侧看到了键和关键字的项目。一旦我单击 listBox1 中的一个键,我就会在行上出现异常:
if (listBox1.SelectedItem != null)
在 listBox1_SelectedIndexChanged 事件中。
例外是:
指数数组的边界之外
System.IndexOutOfRangeException was unhandled
HResult=-2146233080
Message=Index was outside the bounds of the array.
Source=System.Windows.Forms
StackTrace:
at System.Windows.Forms.ListBox.ItemArray.GetItem(Int32 virtualIndex, Int32 stateMask)
at System.Windows.Forms.ListBox.get_SelectedItem()
at GatherLinks.Form1.listBox1_SelectedIndexChanged(Object sender, EventArgs e) in d:\C-Sharp\GatherLinks\GatherLinks-2\GatherLinks\GatherLinks\Form1.cs:line 543
at System.Windows.Forms.ListBox.OnSelectedIndexChanged(EventArgs e)
at System.Windows.Forms.ListBox.WmReflectCommand(Message& m)
at System.Windows.Forms.ListBox.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.Control.SendMessage(Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.Control.ReflectMessageInternal(IntPtr hWnd, Message& m)
at System.Windows.Forms.Control.WmCommand(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
at System.Windows.Forms.Control.DefWndProc(Message& m)
at System.Windows.Forms.Control.WmKillFocus(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ListBox.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
InnerException:
我知道异常是什么意思,但我得到了什么,我该如何解决?
例如,如果我在运行程序时首先移动,使用向上和向下的键箭头在列表框中的键之间移动,然后单击其中一个,我没有得到任何异常。当我运行程序并立即用鼠标单击列表框中的一个键时,会出现异常。
在它们之间移动然后单击其中一个是可以的,但首先单击其中一个会例外。
编辑**
我现在看到,在将 listBox1_SelectedIndexChanged 事件转到此事件 istBox1 之前,鼠标按下:
private void listBox1_MouseDown(object sender, MouseEventArgs e)
{
if (Control.ModifierKeys == Keys.Control || ( Control.ModifierKeys == Keys.Control || e.Button == MouseButtons.Left))
{
listBox1.SelectionMode = SelectionMode.MultiExtended;
}
else if (e.Button == MouseButtons.Left)
{
listBox1.SelectionMode = SelectionMode.One;
}
}
这样做:
listBox1.SelectionMode = SelectionMode.MultiExtended;
然后回到 selectedindexchanged 事件并抛出异常就行了:
if (listBox1.SelectedItem != null)
那也是行号:543