使用鼠标滚动DataGridView

Question

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。

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。

Answer 1

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; 
    } 
} 

Answer 2

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; 
    } 
} 

Answer 3

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。