c# - 为什么在 C# 中单击 winform 中的 datagridview 的单元格时会出现此异常？

Question

我在 vb.net 中有一个我想在 C# 中使用的代码。代码是：

Dim cell As DataGridViewImageCell = CType(tempGrid.Rows(e.RowIndex).Cells(e.ColumnIndex), DataGridViewImageCell)

我正在尝试获取相应的 C# 代码：

public void gridmouseclick(object sender, MouseEventArgs e)
    {
        int i;
        DataGridViewCell cell;

        for (i = 0; i <= 1 - 1; i++)
        {
            cell = (DataGridViewCell)grid[i].Rows[e.X].Cells[e.Y];   
            if (e.Button == MouseButtons.Left)
            {
                cell.Value = imglst.Images[1];
            }
            else if (e.Button == MouseButtons.Right)
            {
                cell.Value = imglst.Images[0];
            }
        }
    }

imglst是的ImageList，所以现在当我单击网格单元格时出现异常，异常是：

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

我正在分配gridmouseclick这样的......

grid[i].CellMouseClick += new DataGridViewCellMouseEventHandler(this.gridmouseclick);

我该如何摆脱这个异常？

Answer 1

这是在 C# 中：

DataGridViewImageCell cell = (DataGridViewImageCell)tempGrid.Rows[e.RowIndex].Cells[e.ColumnIndex]; 

关键点：

1. CType(SourceObject, TargetType)cast 写为(TargetType)SourceObject.
2. 索引Object(index)是用方括号写的Object[index]
3. Dim ObjectName as Type声明写成Type ObjectName

Answer 2

简单的

DataGridViewImageCell cell = 
(DataGridViewImageCell)tempGrid.Rows[e.RowIndex].Cells[e.ColumnIndex];

Answer 3

请更改类型：

DataGridViewImageCell cell =  (DataGridViewImageCell)tempGrid.Rows[e.RowIndex].Cells[e.ColumnIndex];