当我删除一个记录时，WinForms上的DataGridView会抛出异常 [英] DataGridView on WinForms throws exception when I delete a record

问题描述

我没有做过很多WinForms，所以我想知道有没有人可以给我一点帮助。我有一个DataGridView绑定到IList<>。当我从集合（ILIST<>）中删除选定的记录时，我得到以下异常：

System.IndexOutOfRangeException：索引3没有值 p>

我认为我的约束也有点跛脚。所以也许有人可以在这里给我一个指针。

  public Form1（）
 {
 InitializeComponent （）; 
 empGrid.DataSource = stub.GetAllEmplyees（）; 
 empGrid.Columns [FirstName]。Visible = true; 
 StatusStrip.Text =员工管理; 
 
} 
  

我想做的是删除记录，然后刷新DataGridGridView。什么是定义哪些属性要显示在列中的最佳方法？

非常感谢！

解决方案

我这样做，不使用DataSource，因为我不得不自定义单元格输出。

  // for insert 
 foreach（var item in data）
 {
 DataGridViewRow newRow = new DataGridViewRow（）; 
 newRow.CreateCells（myDataGridView，
 your，
 data，
 for，
 each，
 cell，
 here）; 
 myDataGridView.Rows.Add（newRow）; 
} 
 
 //更新
 myDataGridView.Rows [rowIndex] 
 .SetValues（单元格，数据，你，愿望，到，更改，这里）; 
  

为了删除，我没有遇到任何问题：

  myDataGridView.Rows.RemoveAt（rowIndex）; 
  

myDataGridView.Refresh（）; 应该工作刷新。

I have not done a lot with WinForms so I wonder if someone could give me a little assistance with this. I have a DataGridView that is bond to a IList<>. When I delete a selected record from the collection (ILIST<>) I get the following exception:

"System.IndexOutOfRangeException:Index 3 does not have a value"

I think my binding is a little lame too. So maybe someone can give me a pointer here as well.

 public Form1()
    {
        InitializeComponent();
        empGrid.DataSource = stub.GetAllEmplyees();
        empGrid.Columns["FirstName"].Visible = true;
        StatusStrip.Text = "Employee Administration";

    }

What I would like to do is Delete a record and then refresh the DataGridGridView. What is the best way to define which properties you want to display in the columns?

Thanks a lot!

解决方案

I do it this way, not using a DataSource as I had to customise the cell outputs.

// for inserts
foreach (var item in data)
{
    DataGridViewRow newRow = new DataGridViewRow();
    newRow.CreateCells(myDataGridView,
        your,
        data,
        for,
        each,
        cell,
        here);
    myDataGridView.Rows.Add(newRow);
}

    // for updates
    myDataGridView.Rows[rowIndex]
        .SetValues(cell,data,you,wish,to,change,here);

For deleting, I've encountered no problems using:

myDataGridView.Rows.RemoveAt(rowIndex);

myDataGridView.Refresh(); should work for refreshing.

这篇关于当我删除一个记录时，WinForms上的DataGridView会抛出异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！