关于datagridview移动问题

Question

在datagridview移动一行到当前的datagridview显示数据的第一条和最后一条时怎么让滚动条自动滚动.如移动到当前数据的第一行时.滚动条会自动向上滚动将这一行上面的数据显示出来.移动到当前显示的最后一行时.滚动条自动滚动将最后一行下面的数据显示几条出来.不知道我说的清楚不.那们大牛帮忙解决下.小弟感激不尽.....

Answer 1

dataGridView1.FirstDisplayedCell = dataGridView1.Rows[index].Cells[0];控制 FirstDisplayedCell 

Answer 2

dataGridView1.FirstDisplayedScrollingRowIndex = 99; 也可以。

Answer 3

设置下需的属性:this.datagridview.FirstDisplayedScrollingColumnIndex  = datagridview.Columns[X].Index; 横向滚动位置
this.datagridview.FirstDisplayedScrollingRowIndex = datagridview.Rows[X].Index; 竖向滚动位置

Answer 4

代码自己理解一下,注释也很详细了. private void dataGridView1_SelectionChanged(object sender, EventArgs e)
        {
            //Get DisplayBandsInfo field
            var rowBandInfo = typeof(DataGridView).GetField("displayedBandsInfo", BindingFlags.Instance | BindingFlags.NonPublic);
            if (rowBandInfo != null)
            {
                //Get DisplayBandsInfo value
                var val = rowBandInfo.GetValue(dataGridView1);
                //Get first and last displayed row index
                var firstDisplayedScrollingRow = (int)rowBandInfo.FieldType.GetProperty("FirstDisplayedScrollingRow", BindingFlags.Instance | BindingFlags.Public).GetValue(val, null);
                var lastDisplayedScrollingRow = firstDisplayedScrollingRow + dataGridView1.DisplayedRowCount(false) - 1;                if (dataGridView1.CurrentCell != null)
                {
                    //Get current rows index
                    var currentRowIndex = dataGridView1.CurrentCell.RowIndex;
                    //Get scroll method
                    var scrollMethod = typeof(DataGridView).GetMethod("ScrollRowsByCount", BindingFlags.Instance | BindingFlags.NonPublic);
                    if (scrollMethod != null)
                    {
                        //Use negative value scroll up
                        if (currentRowIndex == firstDisplayedScrollingRow)
                        {
                            scrollMethod.Invoke(dataGridView1, new object[] { -2, ScrollEventType.ThumbPosition });
                        }
                        //Use positive value scroll down
                        else if (currentRowIndex == lastDisplayedScrollingRow)
                        {
                            scrollMethod.Invoke(dataGridView1, new object[] { 2, ScrollEventType.ThumbPosition });
                        }
                    }
                }
            }
        }

Answer 5

如果只想滚动一行,修改红色标注的参数
scrollMethod.Invoke(dataGridView1, new object[] { -1, ScrollEventType.ThumbPosition });
scrollMethod.Invoke(dataGridView1, new object[] { 1, ScrollEventType.ThumbPosition });