DataGridView中comboBox(DataGridViewComboBoxColumn)的事件编写

DataGridView中comboBox(DataGridViewComboBoxColumn)的事件编写 收藏

DataGridView中虽然绑定了一个comboBox，但是这个comboBox没有任何事件。

今天想加一个SelectedIndexChanged事件，遍寻网络后找到一可行方法，总结如下：

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DataGridViewComboBoxColumn Fparmrangedesc = new DataGridViewComboBoxColumn();

dgView.Columns.Add(Fparmrangedesc);

dgView.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dgView_EditingControlShowing); //主要是这句

//写事件方法

private void dgView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)

{

if (dgvReportParms.CurrentCell.GetType().Name == "DataGridViewComboBoxCell")

{

((ComboBox)e.Control).SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);

((ComboBox)e.Control).SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);

}

}

private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)

{

//里面想写什么你说了算！

}

DataGridViewComboBoxColumn Fparmrangedesc = new DataGridViewComboBoxColumn();

……

……

dgView.Columns.Add(Fparmrangedesc);

dgView.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dgView_EditingControlShowing); //主要是这句

写事件方法

private void dgView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)

{

if (dgvReportParms.CurrentCell.GetType().Name == "DataGridViewComboBoxCell")

{

((ComboBox)e.Control).SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);

((ComboBox)e.Control).SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);

}

}

private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)

{

//里面想写什么你说了算！

}

最后，最重要的一步：把DataGridView的CausesValidation属性一定要改为false.

原因是在选择下拉框时需要数据验证,可能报错

http://blog.sina.com.cn/s/blog_73fbac9a0100sjje.html

在实际使用中，我用cellvaluechanged 就实现了.
private
void dataGridViewSN_CellValueChanged(object
sender, DataGridViewCellEventArgs e)

{

if (e.RowIndex >= 0)

{

if (dataGridViewSN.Columns[e.ColumnIndex].Name ==
"Status")

{

if (dataGridViewSN["Status",
e.RowIndex].Value.ToString() == "Fail")

{

DataTable dtResult =
new
DataTable();

string strSql;

strSql = string.Format(SqlHelper.Instance.GetSql("QueryErrorCode"),
comboActivity.Text);

dtResult = SqlHelper.Instance.executeSql(strSql);

DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridViewSN.Rows[e.RowIndex].Cells["Error_Code"];

cb.DataSource = dtResult;

cb.ValueMember = "Code";

cb.DisplayMember = "drop_desc";

cb.ReadOnly = false;

//dataGridViewSN.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;

}

else

{

DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridViewSN.Rows[e.RowIndex].Cells["Error_Code"];

cb.Value = null;

cb.DataSource = null;

cb.Items.Clear();

cb.ReadOnly = true;

}

}

}

}