使用鼠標滾動DataGridView

Question

所以我們都熟悉點擊和按住鼠標按鈕，然後將鼠標移動到網格邊緣，列/行滾動和選擇增長的功能。

我有一個基於DataGridView的控件，由於性能問題我必須關閉MultiSelect並自己處理選擇過程，現在也禁用了click + hold滾動功能。

有關如何回寫此功能的任何建議？

我想使用一些簡單的MouseLeave事件，但我不知道如何確定它離開的位置，以及實現動態滾動速度。

Answer 1

就在這個代碼添加到您的Form1_Load的

DataGridView1.MouseWheel += new MouseEventHandler(DataGridView1_MouseWheel); 

而這一個是鼠標滾輪事件

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

不會發生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 你需要設置焦點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; 
    } 
} 

它適用於我。