数据网格视图行索引在刷新时超出范围异常
本文关键字:范围 异常 刷新 网格 数据网 视图 索引 数据 | 更新日期: 2023-09-27 18:34:20
我的 C# 应用程序中有一个数据网格视图。当我突出显示该行并点击删除时,该行将删除,但是当我运行更新和刷新命令时,我得到的索引超出范围异常
private void btnDeleteMember_Click(object sender, EventArgs e)
{
foreach (DataGridViewRow item in this.dgvAllFaculty.SelectedRows)
{
int row = item.Index;
FacultyMember member = memberList[row];
if (row >= 0)
{
memberList.RemoveAt(row);
Save();
this.dgvAllFaculty.Update();
this.dgvAllFaculty.Refresh();
return;
}
}
}
调试时,我注意到它在刷新调用中失败。我得到的错误是
System.IndexOutOfRangException: Index 1 does not have a value
at System.Windows.Forms.CurrencyManager.get_Item(Int32 index)
at
System.Windows.Forms.DataGridView.DataGridViewDataConnection.GetError(Int32 rowIndex)
如果您还有其他需要查看的内容,请告诉我。我想知道当刷新发生时是否疯狂,因为它仍然认为第二行在那里?
好的,我稍微更改了一下代码,它现在可以工作了。在刷新之前,我必须先从 json 文件重新加载数据。
private void btnDeleteMember_Click(object sender, EventArgs e)
{
int count = this.dgvAllFaculty.SelectedRows.Count;
foreach (DataGridViewRow item in this.dgvAllFaculty.SelectedRows)
{
int i = item.Index;
FacultyMember member = memberList[i];
memberList.RemoveAt(i);
Save();
}
if (count > 1)
{
MessageBox.Show(String.Format("{0} faculty memebers deleted", count));
}
else
{
MessageBox.Show("Faculty Member Deleted");
}
// Load the newest data from file before refreshing the view
ViewAll_Load(sender, e);
this.Refresh();
}