Question

我有一个DataGridView，它的第一列样式设置为ComboBox，而不是默认的TextBox。由于在启动时DataGridView中的行数不是固定的，因此添加新行时，我无法将数据加载到每一行的ComboBoxes中。因此，我尝试加载用户在DataGridView中添加一行的事件：

public void myDataGridView_UserAddedRow(object sender, DataGridViewRowEventArgs e)
{
    // Identifiers used are:
    var myTableAdapter = new databaseTableAdapters.myTableTableAdapter();
    var myDataTable = myTableAdapter.GetData();
    int rowIndex = myDataGridView.CurrentcellAddress.Y;
    var comboBoxCell = (DataGridViewComboBoxCell)myDataGridView.Rows[rowIndex].Cells[0];
    string itemToAdd;

    // Load in the data from the data table
    foreach (System.Data.DataRow row in myDataTable.Rows) 
    {
        // Get the current item to be added
        itemToAdd = row[0].ToString();
        // Make sure there are no duplicates
        if (!comboBoxCell.Items.Contains(itemToAdd)) 
        {
            comboBoxCell.Items.Add(itemToAdd)
        }
    }
}

但这仅允许用户单击秒后看到下拉选项。我希望用户只单击一次组合框即可看到选项，而不是不太直观的双击。该怎么办？

Answer 1

该单元格必须获得焦点才能出现下拉菜单，因此双击实际上是单击即可获得对该单元格的焦点，第二次单击即是导致下拉发生。因此，了解如何在this link之后更改焦点。我能够用一行代码修改代码

public void myDataGridView_UserAddedRow(object sender, DataGridViewRowEventArgs e)
{
    // Identifiers used are:
    var myTableAdapter = new databaseTableAdapters.myTableTableAdapter();
    var myDataTable = myTableAdapter.GetData();
    int rowIndex = myDataGridView.CurrentcellAddress.Y;
    var comboBoxCell = (DataGridViewComboBoxCell)myDataGridView.Rows[rowIndex].Cells[0];
    string itemToAdd;

    // Load in the data from the data table
    foreach (System.Data.DataRow row in myDataTable.Rows) 
    {
        // Get the current item to be added
        itemToAdd = row[0].ToString();
        // Make sure there are no duplicates
        if (!comboBoxCell.Items.Contains(itemToAdd)) 
        {
            comboBoxCell.Items.Add(itemToAdd)
        }
    }
    // Send the focus to the next combo box (removes need for a double click)
    myDataGridView.CurrentCell = myDataGridView.Rows[rowIndex + 1].Cells[0]; // <--- HERE
}

只需单击一下，如何使DataGridViewCell中的组合框下拉？

1 个答案: