如何移動gridview的選擇的行上/下KEYUP或KEYDOWN按

Question

1. 用戶選擇一個行
2. 會有向上箭頭和向下箭頭。
3. 如果用戶想向上移動，用戶點擊向上箭頭按鈕
4. 如果用戶想向下移動，然後用戶點擊向下箭頭按鈕
5. 如果行是在隨後的向上箭頭按鈕變爲頂部殘疾人
6. 如果行是再向下箭頭按鈕變爲禁用

我想這代碼，但不是在所有的工作對於上述方案

私人無效KEY_UP（對象發件人，即使是底部tArgs E）

{ 
    if (dataGridView1.CurrentRow == null) return; 
    if (dataGridView1.CurrentRow.Index - 1 >= 0) 
    { 

     dataGridView1.CurrentCell = dataGridView1.Rows[dataGridView1.CurrentRow.Index - 1].Cells[0]; 
     dataGridView1.Rows[dataGridView1.CurrentCell.RowIndex].Selected = true; 
    } 
} 

Answer 1

做的方法是， 在KEY_UP或按鈕彈起點擊 1）獲取當前選擇的行的索引 2）設置當前選擇的行（索引+ 1），只要該索引+1小於行數。

對key_Down或button按下的否定做了點擊。

private void dataGridView1_KeyDown(object sender, KeyEventArgs e) 
    { 
     if (e.KeyCode.Equals(Keys.Up)) 
     { 
      moveUp(); 
     } 
     if (e.KeyCode.Equals(Keys.Down)) 
     { 
      moveDown(); 
     } 
     e.Handled = true; 
    } 

    private void moveUp() 
    { 
     if (dataGridView1.RowCount > 0) 
     { 
      if (dataGridView1.SelectedRows.Count > 0) 
      { 
       int rowCount = dataGridView1.Rows.Count; 
       int index = dataGridView1.SelectedCells[0].OwningRow.Index; 

       if (index == 0) 
       { 
        return; 
       } 
       DataGridViewRowCollection rows = dataGridView1.Rows; 

       // remove the previous row and add it behind the selected row. 
       DataGridViewRow prevRow = rows[index - 1]; 
       rows.Remove(prevRow); 
       prevRow.Frozen = false; 
       rows.Insert(index, prevRow); 
       dataGridView1.ClearSelection(); 
       dataGridView1.Rows[index - 1].Selected = true; 
      } 
     } 
    } 

    private void moveDown() 
    { 
     if (dataGridView1.RowCount > 0) 
     { 
      if (dataGridView1.SelectedRows.Count > 0) 
      { 
       int rowCount = dataGridView1.Rows.Count; 
       int index = dataGridView1.SelectedCells[0].OwningRow.Index; 

       if (index == (rowCount - 2)) // include the header row 
       { 
        return; 
       } 
       DataGridViewRowCollection rows = dataGridView1.Rows; 

       // remove the next row and add it in front of the selected row. 
       DataGridViewRow nextRow = rows[index + 1]; 
       rows.Remove(nextRow); 
       nextRow.Frozen = false; 
       rows.Insert(index, nextRow); 
       dataGridView1.ClearSelection(); 
       dataGridView1.Rows[index + 1].Selected = true; 
      } 
     } 
    } 

你可以看到我已經分離上下移動的方法，所以如果你要使用的按鈕點擊事件，而不是向上鍵和鍵按下事件，你可以在需要時調用它們。

Answer 2

如果你想選擇的行/向下多次拉昇，只要你想，你可以使用此代碼中移動：

最多：

if (dataGridView1.SelectedRows[0].Index != 0) { 
    for (int j = 0; j < this.dataGridView1.Columns.Count; j++) { 
    object tmp = this.dataGridView1[j, dataGridView1.SelectedRows[0].Index].Value; 
    this.dataGridView1[j, dataGridView1.SelectedRows[0].Index ].Value = this.dataGridView1[j, dataGridView1.SelectedRows[0].Index - 1].Value; 
    this.dataGridView1[j, dataGridView1.SelectedRows[0].Index - 1].Value = tmp; 
    } 
    int a = dataGridView1.SelectedRows[0].Index; 
    dataGridView1.ClearSelection(); 
    this.dataGridView1.Rows[a - 1].Selected = true; 
} 

下：

if (dataGridView1.SelectedRows[0].Index != dataGridView1.Rows.Count - 2) { 
    for (int j = 0; j < this.dataGridView1.Columns.Count; j++) { 
    object tmp = this.dataGridView1[j, dataGridView1.SelectedRows[0].Index].Value; 
    this.dataGridView1[j, dataGridView1.SelectedRows[0].Index].Value = this.dataGridView1[j, dataGridView1.SelectedRows[0].Index + 1].Value; 
    this.dataGridView1[j, dataGridView1.SelectedRows[0].Index + 1].Value = tmp; 
    } 
    int i = dataGridView1.SelectedRows[0].Index; 
    dataGridView1.ClearSelection(); 
    this.dataGridView1.Rows[i + 1].Selected = true; 
} 

Answer 3

清理了Jegan的代碼並使其適用於多個datagridviews。

private static void MoveUp(DataGridView dgv) 
    { 
     if (dgv.RowCount <= 0) 
      return; 

     if (dgv.SelectedRows.Count <= 0) 
      return; 

     var index = dgv.SelectedCells[0].OwningRow.Index; 

     if (index == 0) 
      return; 

     var rows = dgv.Rows; 
     var prevRow = rows[index - 1]; 
     rows.Remove(prevRow); 
     prevRow.Frozen = false; 
     rows.Insert(index, prevRow); 
     dgv.ClearSelection(); 
     dgv.Rows[index - 1].Selected = true; 
    } 

    private static void MoveDown(DataGridView dgv) 
    { 
     if (dgv.RowCount <= 0) 
      return; 

     if (dgv.SelectedRows.Count <= 0) 
      return; 

     var rowCount = dgv.Rows.Count; 
     var index = dgv.SelectedCells[0].OwningRow.Index; 

     if (index == (rowCount - 2)) // include the header row 
      return; 

     var rows = dgv.Rows; 
     var nextRow = rows[index + 1]; 
     rows.Remove(nextRow); 
     nextRow.Frozen = false; 
     rows.Insert(index, nextRow); 
     dgv.ClearSelection(); 
     dgv.Rows[index + 1].Selected = true; 
    } 

Answer 4

對於我這樣的工作：

public static void MoveUp(DataGridView dgv) 
    { 
     if (dgv.RowCount <= 0) 
      return; 

     if (dgv.SelectedRows.Count <= 0) 
      return; 

     var index = dgv.SelectedCells[0].OwningRow.Index; 

     if (index == 0) 
      return; 

     var rows = dgv.Rows; 
     var prevRow = rows[index - 1]; 
     rows.Remove(prevRow); 
     prevRow.Frozen = false; 
     rows.Insert(index, prevRow); 
     dgv.ClearSelection(); 
     dgv.Rows[index - 1].Selected = true; 
    } 

    public static void MoveDown(DataGridView dgv) 
    { 
     if (dgv.RowCount <= 0) 
      return; 

     if (dgv.SelectedRows.Count <= 0) 
      return; 

     var rowCount = dgv.Rows.Count; 
     var index = dgv.SelectedCells[0].OwningRow.Index; 

     if (index == rowCount - 1) // Here used 1 instead of 2 
      return; 

     var rows = dgv.Rows; 
     var nextRow = rows[index + 1]; 
     rows.Remove(nextRow); 
     nextRow.Frozen = false; 
     rows.Insert(index, nextRow); 
     dgv.ClearSelection(); 
     dgv.Rows[index + 1].Selected = true; 
    } 

馬里奧的代碼不同的是，我用（rowCount時 - 1）替代（rowCount時 - 2）...更改此之後，它完美地工作。以前，如果你只在你的DataGridView 2行此舉向下沒有工作......

Answer 5

下面是這個問題的一個非常小的解決方案：

private void DataGridView_KeyDown(object sender, KeyEventArgs e) 
    { 
     //I use only one function for moving with the information 
     //e.KeyCode == Keys.Up = move up, else move down 
     if (e.KeyCode.Equals(Keys.Up) || e.KeyCode.Equals(Keys.Down)) 
     { 
      MoveUpDown(e.KeyCode == Keys.Up); 
     } 
     e.Handled = true; 
    } 

    private void MoveUpDown(bool goUp) 
    { 
     try 
     { 
      int currentRowindex = DataGridView.SelectedCells[0].OwningRow.Index; 

      //Here I decide to change the row with the parameter 
      //True -1 or False +1 
      int newRowIndex = currentRowindex + (goUp ? -1 : 1); 

      //Here it must be ensured that we remain within the index of the DGV 
      if (newRowIndex > -1 && newRowIndex < DataGridView.Rows.Count) 
      { 
       DataGridView.ClearSelection(); 
       DataGridView.Rows[newRowIndex].Selected = true; 
      } 
     } 
     catch (Exception) 
     { 
      MessageBox.Show("Error"); 
     } 

    } 

對不起，我還以爲我的代碼是自-explanatory。 我希望我的意見清楚地說明了我是如何處理這個問題的