什么事件在DataGridViewCell中的组合框中捕获了值的变化？

4 回答

• -2

  上面的回答让我在报 Spring 花路上走了一段时间 . 它不起作用，因为它导致多个事件触发，只是不断添加事件 . 问题是上面捕获DataGridViewEditingControlShowingEvent并且它没有捕获更改的值 . 因此，每次你聚焦时都会触发，然后离开组合框，无论它是否已经改变 .

  关于“CurrentCellDirtyStateChanged”的最后一个答案是正确的方法 . 我希望这可以帮助别人避免陷入兔子洞 .

  这是一些代码 .

  // Add the events to listen for
          dataGridView1.CellValueChanged +=
               new DataGridViewCellEventHandler(dataGridView1_CellValueChanged);
          dataGridView1.CurrentCellDirtyStateChanged +=
               new EventHandler(dataGridView1_CurrentCellDirtyStateChanged);
  
      // This event handler manually raises the CellValueChanged event 
      // by calling the CommitEdit method. 
      void dataGridView1_CurrentCellDirtyStateChanged(object sender,
          EventArgs e)
      {
          if (this.dataGridView1.IsCurrentCellDirty)
          {
              // This fires the cell value changed handler below
              dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
          }
      }
  
      private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
      {
          // My combobox column is the second one so I hard coded a 1, flavor to taste
          DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridView1.Rows[e.RowIndex].Cells[1];
          if (cb.Value != null)
          {
                 // do stuff
                 dataGridView1.Invalidate();
          }
       }
  

  回复于 2024-04-19T21:42:50+08:00
• 42

  这是代码，它将触发dataGridView中comboBox中的选择事件：

  public Form1()
      {
          InitializeComponent();
  
          DataGridViewComboBoxColumn cmbcolumn = new DataGridViewComboBoxColumn();
          cmbcolumn.Name = "cmbColumn";
          cmbcolumn.HeaderText = "combobox column";
          cmbcolumn.Items.AddRange(new string[] { "aa", "ac", "aacc" });
          dataGridView1.Columns.Add(cmbcolumn);
          dataGridView1.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dataGridView1_EditingControlShowing);
      }
  
      private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
      {
          ComboBox combo = e.Control as ComboBox;
          if (combo != null)
          {
              combo.SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);
              combo.SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);
          }
      }
  
      private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
      {
          ComboBox cb = (ComboBox)sender;
          string item = cb.Text;
          if (item != null)
              MessageBox.Show(item);
      }
  

  回复于 2024-04-19T21:42:50+08:00
• 13

  您还可以处理 CurrentCellDirtyStateChanged 事件，只要值发生更改，就会调用该事件，即使它未被提交 . 要获取列表中的选定值，您可以执行以下操作：

  var newValue = dataGridView.CurrentCell.EditedFormattedValue;
  

  回复于 2024-04-19T21:42:50+08:00
• 13

  ComboBox cmbBox = (ComboBox)sender;                
  MessageBox.Show(cmbBox.SelectedValue.ToString());
  

  回复于 2024-04-19T21:42:50+08:00