winfrom datagridview中DataGridViewTextBoxColumn的联动处理

这个问题有两种方法 第一种是用DataGridview中自带的DataGridViewTextBoxColumn 控件，第二种是动态添加combobox控件

方法一：

首先 窗体上拖拽一个 DataGridview

然后在这个DataGridview中添加两列DataGridViewTextBoxColumn （第一列叫A，第二列叫B）

然后绑定A代码

A.DataSource = ds.Tables[0].DefaultView;

A.DisplayMember = "table_name";

A.ValueMember = "table_name";

((DataGridViewComboBoxColumn)dataGridView1.Columns[0]).DefaultCellStyle.NullValue = "--请选择--"; //默认值

其次是绑定B代码

//当前选中行的第二列赋值

((DataGridViewComboBoxCell)dataGridView1.Rows[dataGridView1.CurrentCell.RowIndex].Cells[1]).DataSource = ds.Tables[0].DefaultView;

((DataGridViewComboBoxCell)dataGridView1.Rows[dataGridView1.CurrentCell.RowIndex].Cells[1]).DisplayMember = "comments";

((DataGridViewComboBoxCell)dataGridView1.Rows[dataGridView1.CurrentCell.RowIndex].Cells[1]).ValueMember = "column_name";

((DataGridViewComboBoxColumn)dataGridView1.Columns[2]).DefaultCellStyle.NullValue = "--请选择--";

然后添加SelectedIndexChanged事件代码

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)

{

DataGridView dgv = (DataGridView)sender;

if (dgv.CurrentCell.OwningColumn.Name == "A")

{

ComboBox cb = (ComboBox)e.Control;

cb.SelectedIndexChanged += new EventHandler(comboBox_SelectedIndexChanged);

}

}

SelectedIndexChanged事件代码

public void comboBox_SelectedIndexChanged(object sender, EventArgs e)

{

ComboBox comboBox = (ComboBox)sender;

if (dataGridView1.CurrentCell.OwningColumn.Name == "表名")

{

if (comboBox.Text != "")

{

//这是绑定B的方法

DBFieldNote(comboBox.Text);

}

}

}

方法二：

首先实例化combobox对象

private ComboBox comboBox = new ComboBox();

private ComboBox cb = new ComboBox();

其次：

this.dataGridView1.Controls.Add(comboBox);//将控件添加到DataGridview中

DBTableName();//绑定comboBox

comboBox.Visible = false;

comboBox.SelectedIndexChanged += new EventHandler(comboBox_SelectedIndexChanged);//添加事件

private void comboBox_SelectedIndexChanged(object sender, EventArgs e)

{

string name = ((ComboBox)sender).Text;

dataGridView1.CurrentCell.Value = name;//将选中的值添加到DataGridview当前选中的单元格里

DBFieldNote(name);//绑定第二个combobox（也就是cb）

}

public void DBFieldNote(string tablename)

{

this.dataGridView1.Controls.Add(cb);

cb.Visible = false;

cb.SelectedIndexChanged += new EventHandler(cb_SelectedIndexChanged);

......

}

private void cb_SelectedIndexChanged(object sender, EventArgs e)

{

dataGridView1.CurrentCell.Value = cb.Text;

}

private void dataGridView1_CurrentCellChanged(object sender, EventArgs e)

{

if (dataGridView1.CurrentCell != null)

{

if (dataGridView1.CurrentCell.ColumnIndex == 1)//如果选中的是第一列 就显示第一个combobox

{

System.Drawing.Rectangle rect = dataGridView1.GetCellDisplayRectangle(dataGridView1.CurrentCell.ColumnIndex, dataGridView1.CurrentCell.RowIndex ，false);//获取当前选中的单元格的属性（宽 ，高等）

comboBox.Left = rect.Left;

comboBox.Top = rect.Top;

comboBox.Width = rect.Width;

comboBox.Height = rect.Height;

comboBox.Visible = true;

}

else if (dataGridView1.CurrentCell.ColumnIndex==2)//如果是选中第二列就显示cb

{

System.Drawing.Rectangle rect1 = dataGridView1.GetCellDisplayRectangle(comboxIndex + 1, dataGridView1.CurrentCell.RowIndex, false);

cb.Left = rect1.Left;

cb.Top = rect1.Top;

cb.Width = rect1.Width;

cb.Height = rect1.Height;

cb.Visible = true;

}

}

else

{

comboBox.Visible = false;

}

}