C# dataGridView1控件与鼠标操作

Question

如何做到鼠标滚动时，让dataGridView1内的记录焦点也上下移动？
只是行的焦点移动，非记录移动!!! 如果行的焦点不能向下移动了，鼠标滚动也不生效;
鼠标单击或双击时，不可以有让dataGridView1.Rows[i].ReadOnly = true的行获得焦点？直接返回到原来的焦点单元格。

Answer 1

1.如何做到鼠标滚动时，让dataGridView1内的记录焦点也上下移动？
只是行的焦点移动，非记录移动!!! 如果行的焦点不能向下移动了，鼠标滚动也不生效;        this.dataGridView1.MultiSelect = false;
        this.dataGridView1.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;        this.dataGridView1.MouseWheel += new MouseEventHandler(dataGridView1_MouseWheel);
        void dataGridView1_MouseWheel(object sender, MouseEventArgs e)
        {
            int i = e.Delta / -120;
            if (this.dataGridView1.CurrentRow.Index + i > this.dataGridView1.Rows.Count - 1)
            {
                this.dataGridView1.Rows[this.dataGridView1.Rows.Count - 1].Selected = true;
            }
            else if (this.dataGridView1.CurrentRow.Index + i < 0)
            {
                this.dataGridView1.Rows[0].Selected = true;
            }
            else
            {
                this.dataGridView1.Rows[this.dataGridView1.CurrentCell.RowIndex + i].Selected = true;
               
            } 
            this.dataGridView1.CurrentCell = this.dataGridView1.SelectedRows[0].Cells[0];
        }

Answer 2

1.        this.dataGridView1.MouseWheel += new MouseEventHandler(dataGridView1_MouseWheel);
        void dataGridView1_MouseWheel(object sender, MouseEventArgs e)
        {
            int i = e.Delta / -120;
            if (this.dataGridView1.CurrentRow.Index + i > this.dataGridView1.Rows.Count - 1)
            {
                this.dataGridView1.Rows[this.dataGridView1.Rows.Count - 1].Cells[this.dataGridView1.CurrentCell.ColumnIndex].Selected = true;
            }
            else if (this.dataGridView1.CurrentRow.Index + i < 0)
            {
                this.dataGridView1.Rows[0].Cells[this.dataGridView1.CurrentCell.ColumnIndex].Selected = true;
            }
            else
            {
                this.dataGridView1.Rows[this.dataGridView1.CurrentCell.RowIndex + i].Cells[this.dataGridView1.CurrentCell.ColumnIndex].Selected = true;
            }
            this.dataGridView1.CurrentCell = this.dataGridView1.SelectedCells[0];
        }

Answer 3

void dataGridView1_MouseWheel(object sender, System.Windows.Forms.MouseEventArgs e)   
{
DataGridView dataGridView1 = sender as DataGridView;            
if(dataGridView1.CurrentCell != null)
{
DataGridViewCell dvc = dataGridView1.CurrentCell;                    
int ri = dvc.RowIndex;                     
int ci = dvc.ColumnIndex;                    
if (e.Delta > 0)//向上                     
{                       
if (ri > 0)                    
{                            
dvc = dataGridView1.Rows[ri - 1].Cells[ci];                            
dataGridView1.CurrentCell = dvc;                         
}                   
}                   
else                    
{  
if(ri < dataGridView1.Rows.Count - 1)
{
dvc = dataGridView1.Rows[ri + 1].Cells[ci];
dataGridView1.CurrentCell = dvc;
}
}  
}            
}

Answer 4

原来可以用dataGridView1_RowValidating事件。