在不按Control键的情况下选择多行

Question

我有一个gridview,我可以通过按控制键选择多行.是否可以在不按下控制键的情况下实现相同目的.

Answer 1

作为.NET默认的动作也将更新slectedrows您的datagridview,你需要有一个数组保留旧的选择:

DataGridViewRow[] old; 

将更新CellMouseDown(在默认的.net操作修改您的选择之前):

private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
    old = new DataGridViewRow[dataGridView1.SelectedRows.Count];
    dataGridView1.SelectedRows.CopyTo(old,0);  
}

在这之后,你可以做你的变化RowHeaderMouseClick(如RowHeaderSelect为默认的DataGridView selectionmode),或者使用CellMouseClick了FullRowSelect和重新选择那些老所选行:

private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{    
    foreach (DataGridViewRow gr in old)
    {
        if (gr == dataGridView1.CurrentRow)
        {
            gr.Selected = false;
        }
        else
        {
            gr.Selected = true;
        }    
    }  
}

编辑:更好的解决方案:
您需要实现自己datagridview的原始派生,并覆盖OnCellMouseDown&OnCellMouseClick取消默认的取消选择操作并使其顺利进行.创建一个像这样的新类:

Using System;
Using System.Windows.Forms;

public class myDataGridView:DataGridView
{
    protected override void OnCellMouseDown(DataGridViewCellMouseEventArgs e)
    {
        //base.OnCellMouseDown(e);
        this.Rows[e.RowIndex].Selected = !this.Rows[e.RowIndex].Selected;
    }

    protected override void OnCellMouseClick(DataGridViewCellMouseEventArgs e)
    {
        //base.OnCellMouseClick(e);
    }
}

并在您的Form.Designer.cs中将DataGridView对象datagridview1(如果是名称)更改为myDataGridView对象......

例如:改变

private System.Windows.Forms.DataGridView dataGridView1; 至

private myDataGridView dataGridView1;

并改变

this.dataGridView1=new System.Windows.Forms.DataGridView() 至

this.dataGridView1=new myDataGridView ()