[英]invalidargument=value of '8' is not valid for 'index'
So im getting the error message invalidargument=value of '8' is not valid for 'index' but this should be fine since the listview has 9 (10) items. 因此,我收到错误消息invalidargument = value'8'对于'index'无效,但这应该没问题,因为listview有9(10)个项目。
My code is this: 我的代码是这样的:
private async void backgroundWorker3_DoWork(object sender, DoWorkEventArgs e)
{
passArguments result = (passArguments)e.Argument;
e.Result = result;
while (running >= maxRunning)
{
editList("Waiting", result.passedFileName, result.passedNum, 1);
await Task.Delay(500);
}
running++;
editList("Loading...", result.passedFileName, result.passedNum, 0);
//do stuff
}
void editList(string message, string fileName, int number, int image)
{
listView1.BeginUpdate();
try
{
string[] row = { message, fileName };
var listViewItem = new ListViewItem(row);
listViewItem.ImageIndex = image;
listView1.Items[number] = (listViewItem);
}
catch (Exception ex)
{
MessageBox.Show(number + " | " + ex.Message + Environment.NewLine + fileName + Environment.NewLine + message + Environment.NewLine + "COUNT: "+listView1.Items.Count);
}
listView1.EndUpdate();
}
But when I remove the while loop, it doesn't throw the error. 但是,当我删除while循环时,它不会引发错误。 Im not sure why this is, can anyone help me out? 我不确定为什么会这样,有人可以帮助我吗?
Edit: 编辑:
Stack Trace 堆栈跟踪
System.ArgumentException was unhandled by user code
HResult=-2147024809
Message=InvalidArgument=Value of '8' is not valid for 'index'.
Source=System.Windows.Forms
StackTrace:
at System.Windows.Forms.ListView.ListViewNativeItemCollection.RemoveAt(Int32 index)
at System.Windows.Forms.ListView.ListViewNativeItemCollection.set_Item(Int32 displayIndex, ListViewItem value)
at System.Windows.Forms.ListView.ListViewItemCollection.set_Item(Int32 index, ListViewItem value)
at ***.Form1.editList(String message, String fileName, Int32 number, Int32 image) in ***\Form1.cs:line 347
at ***.Form1.<backgroundWorker3_DoWork>d__c.MoveNext() in ***\Form1.cs:line 369
InnerException:
From the looks of things, you're trying to assign an item to an element in listview1.Items
in a position that is out of range. 从外观上,您试图将一个项目分配给listview1.Items
中超出范围的位置的元素。
listView1.Items[number]
will not expand the number of items if number is not in range of the listview. 如果number不在listview范围内,则listView1.Items[number]
将不会扩展项目数。
I would propose something like this: 我会提出这样的建议:
void editList(string message, string fileName, int number, int image)
{
ListViewItem dummyrow = new ListViewItem(new string[] {"loading", ""});
listView1.BeginUpdate();
try
{
string[] row = { message, fileName };
var listViewItem = new ListViewItem(row);
listViewItem.ImageIndex = image;
while (listView1.Items.length <= number) {
//if the listview doesn't have enough rows yet,
//add a loading message as placeholder
listView1.Items.add(dummyrow);
}
listView1.Items[number] = (listViewItem);
}
catch (Exception ex)
{
MessageBox.Show(number + " | " + ex.Message + Environment.NewLine + fileName + Environment.NewLine + message + Environment.NewLine + "COUNT: "+listView1.Items.Count);
}
listView1.EndUpdate();
}
The following does not provide an answer but is more like a collection of hints I have found searching for an answer (I will delete this post when there is a real answer) 以下内容不提供答案,但更像是我在寻找答案时发现的一些提示(如果有真实答案,我将删除此帖子)
Again the stack trace: 再次是堆栈跟踪:
System.ArgumentException was unhandled by user code HResult=-2147024809
Message=InvalidArgument=Value of '8' is not valid for 'index'.
Source=System.Windows.Forms
StackTrace:
at System.Windows.Forms.ListView.ListViewNativeItemCollection.RemoveAt(Int32 index)
at System.Windows.Forms.ListView.ListViewNativeItemCollection.set_Item(Int32 displayIndex, ListViewItem value)
at System.Windows.Forms.ListView.ListViewItemCollection.set_Item(Int32 index, ListViewItem value)
at ***.Form1.editList(String message, String fileName, Int32 number, Int32 image) in ***\Form1.cs:line 347
at ***.Form1.<backgroundWorker3_DoWork>d__c.MoveNext() in ***\Form1.cs:line 369
The following code is taken from .Net-Framework 4.5.2; 以下代码摘自.Net-Framework 4.5.2; I added own comments into the code (but not with //
to make clear which ones are mine) 我在代码中添加了自己的注释(但不添加//
来表明属于我的注释)
The System.ArgumentException
is thrown here: System.ArgumentException
抛出在这里:
public virtual void RemoveAt(int index) {
if (index < 0 || index >= owner.columnHeaders.Length)
throw new ArgumentOutOfRangeException("index", SR.GetString(SR.InvalidArgument, "index", (index).ToString(CultureInfo.CurrentCulture)));
int w = owner.columnHeaders[index].Width; // Update width before detaching from ListView
// in Tile view our ListView uses the column header collection to update the Tile Information
if (owner.IsHandleCreated && this.owner.View != View.Tile) {
!!! important:
int retval = unchecked( (int) (long)owner.SendMessage(NativeMethods.LVM_DELETECOLUMN, index, 0));
^-----^----> quite strange...
_________________________________________________
| Here it is (probably):
| if (0 == retval)
| throw new ArgumentException(SR.GetString(SR.InvalidArgument,
| "index",
| (index).ToString(CultureInfo.CurrentCulture)));
}
the value of retval
is defined by: retval
的值定义为:
internal IntPtr SendMessage(int msg, int wparam, int lparam) {
Debug.Assert(IsHandleCreated, "Performance alert! Calling Control::SendMessage and forcing handle creation. Re-work control so handle creation is not required to set properties. If there is no work around, wrap the call in an IsHandleCreated check.");
return UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), msg, wparam, lparam);
}
which calls the method: 调用方法:
[DllImport(ExternDll.User32, CharSet = CharSet.Auto)]
[ResourceExposure(ResourceScope.None)]
public static extern IntPtr SendMessage(HandleRef hWnd, int msg, int wParam, int lParam);
Here are some comments to this method from PInvoke.net 这是来自PInvoke.net对此方法的一些评论
1) Use IntPtr instead of UIntrPtr: The UIntPtr type is not CLS-compliant 1)使用IntPtr而不是UIntrPtr:UIntPtr类型不符合CLS
2) NEVER use "int" or "integer" as lParam. 2)切勿将“ int”或“ integer”用作lParam。 Your code WILL crash on 64-bit windows. 您的代码将在64位Windows上崩溃。 ONLY use IntPtr, a "ref" structure, or an "out" structure. 仅使用IntPtr,“ ref”结构或“ out”结构。
3) NEVER use "bool", "int", or "integer" as the return value. 3)永远不要使用“ bool”,“ int”或“ integer”作为返回值。 Your core WILL crash on 64-bit windows. 您的核心将在64位Windows上崩溃。 ONLY use IntPtr. 仅使用IntPtr。 It's not safe to use bool - pInvoke cannot marshal an IntPtr to a boolean. 使用bool并不安全-pInvoke无法将IntPtr编组为布尔值。
[...] [...]
2) The return IntPtr of SendMessage might be IntPtr.Zero 2)SendMessage的返回IntPtr可能是IntPtr.Zero
As you can see lparam
is 0
(-> integer) when SendMessage
is called. 如您所见,调用SendMessage
时, lparam
为0
(->整数)。 (I personally don't think that this is the reason for our problem; but it could.) (我个人不认为这是导致我们出现问题的原因;但是可以。)
I hope I have helped those who want to go deeper into this problem. 我希望我对那些想深入研究这个问题的人有所帮助。
I guess it could be useful to know why IntPtr
could be IntPtr.Zero
我想知道为什么 IntPtr
可以是IntPtr.Zero
可能IntPtr.Zero
Happy researching! 研究愉快!
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