DataGridView用法合集(9)：添加控件

news2024/11/22 21:51:30

45. DataGridView列中显示选择框CheckBox

46. DataGridView中显示下拉框ComboBox

47. DataGridView单击打开下拉框

48. DataGridView中显示按钮

49. DataGridView中显示链接

50. DataGridView中显示图像

45. DataGridView列中显示选择框CheckBox

[VB.NET]

'添加CheckBox列

Dim column As New DataGridViewCheckBoxColumn

DataGridView1.Columns.Add(column)

[C#]

//添加CheckBox列

DataGridViewCheckBoxColumn column = new DataGridViewCheckBoxColumn();

DataGridView1.Columns.Add(column);

中间状态在内的三种状态表示

[VB.NET]

'能够显示3种检查状态

Dim column As DataGridViewCheckBoxColumn = CType(DataGridView1.Columns(0), DataGridViewCheckBoxColumn)

column.ThreeState = True

[C#]

DataGridViewCheckBoxColumn column =(DataGridViewCheckBoxColumn)DataGridView1.Columns[0];

column.ThreeState = true;

46. DataGridView中显示下拉框ComboBox

[VB.NET]

Dim column As New DataGridViewComboBoxColumn()
'在ComboBox的列表中指定要显示的项目
column.Items.Add("日曜日")
column.Items.Add("月曜日")
column.Items.Add("火曜日")
column.Items.Add("水曜日")
column.Items.Add("木曜日")
column.Items.Add("金曜日")
column.Items.Add("土曜日")
'"Week"显示绑定在列中的数据
column.DataPropertyName = "Week"
DataGridView1.Columns.Insert(DataGridView1.Columns("Week").Index, column)
DataGridView1.Columns.Remove("Week")
column.Name = "Week"

[C#]

DataGridViewComboBoxColumn column = new DataGridViewComboBoxColumn();
//显示绑定在列中的数据
column.Items.Add("日曜日");
column.Items.Add("月曜日");
column.Items.Add("火曜日");
column.Items.Add("水曜日");
column.Items.Add("木曜日");
column.Items.Add("金曜日");
column.Items.Add("土曜日");
//"Week"显示绑定在列中的数据
column.DataPropertyName = "Week";
DataGridView1.Columns.Insert(DataGridView1.Columns["Week"].Index, column);
DataGridView1.Columns.Remove("Week");
column.Name = "Week";

通过列Data绑定设置ComboBox

[VB.NET]

Dim weekTable As New DataTable("WeekTable")
weekTable.Columns.Add("Display", GetType(String))
weekTable.Columns.Add("Value", GetType(Integer))
weekTable.Rows.Add("日曜日", 0)
weekTable.Rows.Add("月曜日", 1)
weekTable.Rows.Add("火曜日", 2)
weekTable.Rows.Add("水曜日", 3)
weekTable.Rows.Add("木曜日", 4)
weekTable.Rows.Add("金曜日", 5)
weekTable.Rows.Add("土曜日", 6)
Dim column As New DataGridViewComboBoxColumn()
column.DataPropertyName = "Week"
'DataGridViewComboBoxColumnのDataSourceを設定
column.DataSource = weekTable
column.ValueMember = "Value"
column.DisplayMember = "Display"
DataGridView1.Columns.Add(column)

[C#]

DataTable weekTable = new DataTable("WeekTable");
weekTable.Columns.Add("Display", typeof(string));
weekTable.Columns.Add("Value", typeof(int));
weekTable.Rows.Add("日曜日", 0);
weekTable.Rows.Add("月曜日", 1);
weekTable.Rows.Add("火曜日", 2);
weekTable.Rows.Add("水曜日", 3);
weekTable.Rows.Add("木曜日", 4);
weekTable.Rows.Add("金曜日", 5);
weekTable.Rows.Add("土曜日", 6);
DataGridViewComboBoxColumn column = new DataGridViewComboBoxColumn();
column.DataPropertyName = "Week";
column.DataSource = weekTable;
column.ValueMember = "Value";
column.DisplayMember = "Display";
DataGridView1.Columns.Add(column);

默认状态下，所有下拉框都显示；DisplayStyleForCurrentCellOnly＝True的状态下，当前的单元格显示下拉框，其余不显示；还有一种就是光标移动时强调显示。如下图左中右三列。

47. DataGridView单击打开下拉框

通常情况下要打开下拉框需要点击目标单元格三次，第一次选中单元格，第二次进入编辑状态，第三次才能打开下拉框

[VB.NET]

Private Sub DataGridView1_CellEnter(ByVal sender As Object, _
        ByVal e As DataGridViewCellEventArgs) _
        Handles DataGridView1.CellEnter
    Dim dgv As DataGridView = CType(sender, DataGridView)
    If dgv.Columns(e.ColumnIndex).Name = "ComboBox" AndAlso _
        TypeOf dgv.Columns(e.ColumnIndex) Is DataGridViewComboBoxColumn Then
        SendKeys.Send("{F4}")
    End If
End Sub

[C#]

private void DataGridView1_CellEnter(object sender,
    DataGridViewCellEventArgs e)
{
    DataGridView dgv = (DataGridView)sender;
    if (dgv.Columns[e.ColumnIndex].Name == "ComboBox" &&
       dgv.Columns[e.ColumnIndex] is DataGridViewComboBoxColumn)
    {
        SendKeys.Send("{F4}");
    }
}

48. DataGridView中显示按钮

[VB.NET]

Dim column As New DataGridViewButtonColumn()
column.Name = "Button"
column.UseColumnTextForButtonValue = True
column.Text = "详细阅读"
DataGridView1.Columns.Add(column)

[C#]

DataGridViewButtonColumn column = new DataGridViewButtonColumn();
column.Name = "Button";
column.UseColumnTextForButtonValue = true;
column.Text = "详细阅读";
DataGridView1.Columns.Add(column);

按钮按下事件取得

[VB.NET]

Private Sub DataGridView1_CellContentClick(ByVal sender As Object, _
        ByVal e As DataGridViewCellEventArgs) _
        Handles DataGridView1.CellContentClick
    Dim dgv As DataGridView = CType(sender, DataGridView)
    If dgv.Columns(e.ColumnIndex).Name = "Button" Then
        MessageBox.Show((e.RowIndex.ToString() + _
            "行按钮被点击了。"))
    End If
End Sub

[C#]

private void DataGridView1_CellContentClick(object sender,
    DataGridViewCellEventArgs e)
{
    DataGridView dgv = (DataGridView)sender;
    if (dgv.Columns[e.ColumnIndex].Name == "Button")
    {
        MessageBox.Show(e.RowIndex.ToString() +
            "行按钮被点击了。");
    }
}

49. DataGridView中显示链接

[VB.NET]

Dim column As New DataGridViewLinkColumn()

column.Name = "Link"

column.UseColumnTextForLinkValue = True

column.Text = "详细阅读"

column.LinkBehavior = LinkBehavior.HoverUnderline

column.TrackVisitedState = True

DataGridView1.Columns.Add(column)

[C#]

DataGridViewLinkColumn column = new DataGridViewLinkColumn();

column.Name = "Link";

column.UseColumnTextForLinkValue = true;

column.Text = "详细阅读";

column.LinkBehavior = LinkBehavior.HoverUnderline;

column.TrackVisitedState = true;

DataGridView1.Columns.Add(column);

链接按下事件取得

[VB.NET]

Private Sub DataGridView1_CellContentClick(ByVal sender As Object, _
        ByVal e As DataGridViewCellEventArgs) _
        Handles DataGridView1.CellContentClick
    Dim dgv As DataGridView = CType(sender, DataGridView)
    If dgv.Columns(e.ColumnIndex).Name = "Link" Then
        MessageBox.Show((e.RowIndex.ToString() + _
            "行按钮被点击了。"))
        Dim cell As DataGridViewLinkCell = _
            CType(dgv(e.ColumnIndex, e.RowIndex), DataGridViewLinkCell)
        cell.LinkVisited = True
    End If
End Sub

[C#]

private void DataGridView1_CellContentClick(object sender,
    DataGridViewCellEventArgs e)
{
    DataGridView dgv = (DataGridView)sender;
    if (dgv.Columns[e.ColumnIndex].Name == "Link")
    {
        MessageBox.Show(e.RowIndex.ToString() +
            "行按钮被点击了。");
        DataGridViewLinkCell cell =
            (DataGridViewLinkCell)dgv[e.ColumnIndex, e.RowIndex];
        cell.LinkVisited = true;
    }
}

50. DataGridView中显示图像

[VB.NET]

Dim column As New DataGridViewImageColumn()

column.Name = "Image"

column.ValuesAreIcons = False

column.Image = New Bitmap("C:/null.gif")

column.ImageLayout = DataGridViewImageCellLayout.Zoom

column.Description = "图像"

DataGridView1.Columns.Add(column)

DataGridView1("Image", 0).Value = New Bitmap("C:/top.gif") '

[C#]

DataGridViewImageColumn column = new DataGridViewImageColumn();

column.Name = "Image";

column.ValuesAreIcons = false;

column.Image = new Bitmap("C://null.gif");

column.ImageLayout = DataGridViewImageCellLayout.Zoom;

column.Description = "图像";

DataGridView1.Columns.Add(column);

DataGridView1["Image", 0].Value = new Bitmap("C://top.gif");

图片属性单元格未设值时红差不显示的设定

[VB.NET]

Dim imageColumn As DataGridViewImageColumn = _

CType(DataGridView1.Columns("Image"), DataGridViewImageColumn)

imageColumn.DefaultCellStyle.NullValue = Nothing

[C#]