ArgumentOutOfRangeException未处理(从Form构造函数抛出)

本文关键字：构造函数 Form 未处理 ArgumentOutOfRangeException | 更新日期: 2023-09-27 18:17:06

好，下面是我要处理的稍微详细的概述:

  • 我正在创建一个带有标准化树视图的表单来选择患者。
  • 从组合框中选择该患者的相关作业在两个datagridview的顶部。
  • 一旦选择了两个作业，每个datagridview将填充相关的授权，然后可以将其拖放到另一个作业的datagridview，以便重新分配它/它们。

略不详细的简介:

我试图处理两个datagridview之间的拖放事件序列。到目前为止，它们大部分时间都可以工作，但是当最后一行从gridview中删除时，并且表单尝试刷新时，Program.cs文件在尝试创建新表单对象时抛出异常。

Program.cs文件中的代码如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Job2JobTransfer
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1()); // this is where the error gets thrown.
        }
    }
}

看起来很简单，对吧?这让我怀疑是否在构造函数中隐藏了一些我没有考虑到的东西，或者是否我太迟钝而没有意识到自己的错误。

下面是我按照dgv1_mousedown、dgv2_dragEnter和dgv2_dragDrop的顺序为拖放事件编写的代码。相反是相同的代码，只是重命名。

 private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
        {
            int index = e.RowIndex;
            dataGridView1.DoDragDrop(dataGridView1.Rows[index], DragDropEffects.Move);
        }
        private void dataGridView2_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
        {
            int index = e.RowIndex;
            dataGridView2.DoDragDrop(dataGridView2.Rows[index], DragDropEffects.Move);
        }
        private void dataGridView1_DragEnter(object sender, DragEventArgs e)
        {
            DataGridView otherGridView = (DataGridView)sender;
            if (e.Data.GetDataPresent(typeof(DataGridViewRow)))
            {
                if (!dataGridView1.Rows.Contains((DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow))))
                {
                    e.Effect = DragDropEffects.Move;
                }
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }
 private void dataGridView2_DragEnter(object sender, DragEventArgs e)
        {
            DataGridView otherGridView = (DataGridView)sender;
            if (e.Data.GetDataPresent(typeof(DataGridViewRow)))
            {
                if (!dataGridView2.Rows.Contains((DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow))))
                    e.Effect = DragDropEffects.Move;
            }
            else
                e.Effect = DragDropEffects.None;
        }
private void dataGridView2_DragDrop(object sender, DragEventArgs e)
        {
            DataGridViewRow tempRow = (DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow));
            WorkAuthorization tempAuth = new WorkAuthorization();
            tempAuth = (WorkAuthorization)tempRow.DataBoundItem;
            dataGridView2.DataSource = null;
            workAuthList2.Add(tempAuth);
            dataGridView2.DataSource = workAuthList2;
            try
            {
                dataGridView1.DataSource = null;
                workAuthList1.Remove(tempAuth);
                dataGridView1.DataSource = workAuthList1;
            }
            catch
            {
                int index = 0; //For the sake of a break point while debugging
            }
            dataGridView2.Refresh();
            dataGridView1.Refresh();
        }

我通常不会在这个网站上发布东西，所以如果我在格式或其他方面犯了错误，我道歉。如果有，请告诉我，我会尽力改正的。如果我需要澄清一些事情或包含更多信息，也可以这样做。提前感谢任何人可能提供的任何帮助/建议。

错误提示:

类型为"System"的未处理异常。在System.Windows.Forms.dll中发生了ArgumentOutOfRangeException

附加信息:提供的行索引超出范围。

异常堆栈

:

在System.Windows.Forms.DataGridViewRowCollection

。GetRowState (Int32 rowIndex)在System.Windows.Forms.DataGridView。OnRowHeaderMouseDown(HitTestInfo hti, Boolean isshifdown, Boolean isControlDown)在System.Windows.Forms.DataGridView。OnCellMouseDown (DataGridViewCellMouseEventArgs e)在System.Windows.Forms.DataGridView。OnMouseDown (MouseEventArgs e)在System.Windows.Forms.Control.WmMouseDown (Message&m，鼠标按钮，点击32下)在System.Windows.Forms.Control.WndProc (Message&米)在System.Windows.Forms.DataGridView.WndProc (Message&米)在System.Windows.Forms.Control.ControlNativeWindow.OnMessage (Message&米)在System.Windows.Forms.Control.ControlNativeWindow.WndProc (Message&米)在System.Windows.Forms.NativeWindow。DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)在System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW (MSG&味精)在System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager。fpushmessagelloop (IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)在System.Windows.Forms.Application.ThreadContext。RunMessageLoopInner(Int32 reason, ApplicationContext context)在System.Windows.Forms.Application.ThreadContext。runmessagelloop (Int32 reason, ApplicationContext context)在System.Windows.Forms.Application。运行(mainForm形式)在c:' users ' rhuntsman ' subversion' WindowsApps'ContractPatients'Job2JobTransfer'Job2JobTransfer'Program.cs:第19行在System.AppDomain。_nExecuteAssembly(运行时汇编程序集，字符串[]args)在System.AppDomain。ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)在Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly ()在System.Threading.ThreadHelper。ThreadStart_Context(对象状态)在System.Threading.ExecutionContext。RunInternal(ExecutionContext, ExecutionContext, ContextCallback, callback, Object state, Boolean, preserveSyncCtx)在System.Threading.ExecutionContext。运行(ExecutionContext ExecutionContext, ContextCallback, callback, Object state, Boolean, preserveSyncCtx)在System.Threading.ExecutionContext。运行(ExecutionContext, ExecutionContext, ContextCallback, callback, Object state)在System.Threading.ThreadHelper.ThreadStart ()

ArgumentOutOfRangeException未处理(从Form构造函数抛出)

似乎dataGridView1. dodragdrop (dataGridView1. dodragdrop)。行(指数),DragDropEffects.Move);或者另一个被调用，但索引无效或者行是空的，诸如此类。可能是由于某种原因，在窗体初始化期间调用了其中一个事件处理程序。可以从设计器文件中删除事件处理程序，并将其移动到窗体中。OnLoad。如果问题仍然存在，您可以设置一个加载变量，并在事件处理程序中证明表单是否已加载。

编辑:你也可以简单地检查如果dataGridView1和dataGridView2包含行在索引:

int index = e.RowIndex;
if(dataGridView1.Rows.Count() > 0 && index <= dataGridView1.Rows.Count()) {
    dataGridView1.DoDragDrop(dataGridView1.Rows[index], DragDropEffects.Move); 
}

编辑2:这段代码对我来说没有问题:

public class WorkAuthorization
{
    public string Name { get; set; }
    public string Description { get; set; }
}
public partial class Form1 : Form
{
    private List<WorkAuthorization> workAuthList1;
    private List<WorkAuthorization> workAuthList2;
    public Form1()
    {
        InitializeComponent();
        workAuthList1 = new List<WorkAuthorization>();
        workAuthList1.Add(new WorkAuthorization { Name = "Authorization1", Description = "Description1" });
        workAuthList1.Add(new WorkAuthorization { Name = "Authorization2", Description = "Description2" });
        workAuthList1.Add(new WorkAuthorization { Name = "Authorization3", Description = "Description3" });
        workAuthList2 = new List<WorkAuthorization>();
        workAuthList2.Add(new WorkAuthorization { Name = "Authorization4", Description = "Description4" });
        workAuthList2.Add(new WorkAuthorization { Name = "Authorization5", Description = "Description5" });
        workAuthList2.Add(new WorkAuthorization { Name = "Authorization6", Description = "Description6" });
    }
    private void comboBox1_SelectedValueChanged(object sender, EventArgs e)
    {
        LoadAuthorizations1();
    }
    private void LoadAuthorizations1()
    {
        dataGridView1.DataSource = workAuthList1;
    }
    private void comboBox2_SelectedValueChanged(object sender, EventArgs e)
    {
        LoadAuthorizations2();
    }
    private void LoadAuthorizations2()
    {
        dataGridView2.DataSource = workAuthList2;
    }
    private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
    {
        int index = e.RowIndex;
        dataGridView1.DoDragDrop(dataGridView1.Rows[index], DragDropEffects.Move);
    }
    private void dataGridView1_DragEnter(object sender, DragEventArgs e)
    {
        DataGridView otherGridView = (DataGridView)sender;
        if (e.Data.GetDataPresent(typeof(DataGridViewRow)))
        {
            if (!dataGridView1.Rows.Contains((DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow))))
            {
                e.Effect = DragDropEffects.Move;
            }
        }
        else
        {
            e.Effect = DragDropEffects.None;
        }
    }
    private void dataGridView2_DragEnter(object sender, DragEventArgs e)
    {
        DataGridView otherGridView = (DataGridView)sender;
        if (e.Data.GetDataPresent(typeof(DataGridViewRow)))
        {
            if (!dataGridView2.Rows.Contains((DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow))))
            {
                e.Effect = DragDropEffects.Move;
            }
        }
        else
        {
            e.Effect = DragDropEffects.None;
        }
    }
    private void dataGridView2_DragDrop(object sender, DragEventArgs e)
    {
        DataGridViewRow tempRow = (DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow));
        WorkAuthorization tempAuth = new WorkAuthorization();
        tempAuth = (WorkAuthorization)tempRow.DataBoundItem;
        dataGridView2.DataSource = null;
        workAuthList2.Add(tempAuth);
        dataGridView2.DataSource = workAuthList2;
        try
        {
            dataGridView1.DataSource = null;
            workAuthList1.Remove(tempAuth);
            dataGridView1.DataSource = workAuthList1;
        }
        catch
        {
            int index = 0; //For the sake of a break point while debugging
        }
        dataGridView2.Refresh();
        dataGridView1.Refresh();
    }
}
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