Question

因此我收到错误消息invalidargument =＆＃39; 8＆＃39;不适用于＆＃39; index＆＃39; 但这应该没问题，因为listview有9（10）项。

enter image description here

我的代码是：

 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();
}

但是当我删除while循环时，它不会抛出错误。我不知道为什么会这样，有人可以帮帮我吗？

编辑：

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:

Answer 1

从外观上看，您尝试将某个项目分配到listview1.Items中某个位置超出范围的元素。

如果数字不在列表视图的范围内，

listView1.Items[number]将不会扩展项目数。

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();
}

Answer 2

以下内容未提供答案，但更像是我找到答案的提示集合（当有真实答案时我会删除此帖子）

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

以下代码来自.Net-Framework 4.5.2;我在代码中添加了自己的注释（但不是//，以明确哪些是我的）

System.ArgumentException被抛出：

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)));
                }

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);
        }

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);

以下是PInvoke.net对此方法的一些评论

1）使用IntPtr而不是UIntrPtr：UIntPtr类型不符合CLS

2）永远不要使用“int”或“integer”作为lParam。您的代码将在64位窗口上崩溃。只使用IntPtr，“ref”结构或“out”结构。

3）永远不要使用“bool”，“int”或“integer”作为返回值。您的核心将在64位窗口上崩溃。只使用IntPtr。使用bool是不安全的 - pInvoke不能将IntPtr编组为布尔值。

[...]

2）SendMessage的返回IntPtr可能是IntPtr.Zero

在调用lparam时，您可以看到0是SendMessage（ - ＆gt;整数）。（我个人认为这不是我们问题的原因;但它可以。）

我希望我帮助那些想要深入解决这个问题的人。

我想知道为什么 IntPtr可能是IntPtr.Zero

会很有用

快乐的研究！

invalidargument =＆＃39; 8＆＃39;的值不适用于＆＃39; index＆＃39;

2 个答案: