使用鼠标滚动DataGridView
问题描述:
所以我们都熟悉点击和按住鼠标按钮,然后将鼠标移动到网格边缘,列/行滚动和选择增长的功能。使用鼠标滚动DataGridView
我有一个基于DataGridView的控件,由于性能问题我必须关闭MultiSelect并自己处理选择过程,现在也禁用了click + hold滚动功能。
有关如何回写此功能的任何建议?
我想使用一些简单的MouseLeave事件,但我不知道如何确定它离开的位置,以及实现动态滚动速度。
答
就在这个代码添加到您的Form1_Load的
DataGridView1.MouseWheel += new MouseEventHandler(DataGridView1_MouseWheel);
而这一个是鼠标滚轮事件
void DataGridView1_MouseWheel(object sender, MouseEventArgs e)
{
int currentIndex = this.DataGridView1.FirstDisplayedScrollingRowIndex;
int scrollLines = SystemInformation.MouseWheelScrollLines;
if (e.Delta > 0)
{
this.DataGridView1.FirstDisplayedScrollingRowIndex
= Math.Max(0, currentIndex - scrollLines);
}
else if (e.Delta < 0)
{
this.DataGridView1.FirstDisplayedScrollingRowIndex
= currentIndex + scrollLines;
}
}
+0
有时我得到这个System.ArgumentOutOfRangeException – Timeless
答
不会发生System.ArgumentOutOfRangeException如果:
void DataGridView1_MouseWheel(object sender, MouseEventArgs e)
{
int currentIndex = this.DataGridView1.FirstDisplayedScrollingRowIndex;
int scrollLines = SystemInformation.MouseWheelScrollLines;
if (e.Delta > 0)
{
this.DataGridView1.FirstDisplayedScrollingRowIndex = Math.Max(0, currentIndex - scrollLines);
}
else if (e.Delta < 0)
{
if (this.DataGridView1.Rows.Count > (currentIndex + scrollLines))
this.DataGridView1.FirstDisplayedScrollingRowIndex = currentIndex + scrollLines;
}
}
答
完整答案 你需要设置焦点Datagridview
private void DataGridView1_MouseEnter(object sender, EventArgs e)
{
DataGridView1.Focus();
}
then Add Mouse wheel event in Load function
DataGridView1.MouseWheel += new MouseEventHandler(DataGridView1_MouseWheel);
Finally Create Mouse wheel function
void DataGridView1_MouseWheel(object sender, MouseEventArgs e)
{
int currentIndex = this.DataGridView1.FirstDisplayedScrollingRowIndex;
int scrollLines = SystemInformation.MouseWheelScrollLines;
if (e.Delta > 0)
{
this.DataGridView1.FirstDisplayedScrollingRowIndex = Math.Max(0, currentIndex - scrollLines);
}
else if (e.Delta < 0)
{
if (this.DataGridView1.Rows.Count > (currentIndex + scrollLines))
this.DataGridView1.FirstDisplayedScrollingRowIndex = currentIndex + scrollLines;
}
}
它适用于我。
你能对你的问题更具体吗?你可以把一段代码(如果你做了什么)? – Priyank
我还没有做任何事情......我希望能够在编码之前以合理的方式得到一些(一般)指导。 – ChandlerPelhams