在 selectedIndexChanged 事件上访问组合框的值

Question

我有一个comboBoxwithSelectedItemChanged事件。所以我想提取所选项目的值，例如：private void cboCustomerType_SelectedIndexChanged(object sender, EventArgs e){    var db = new SQLConnMgr();    ComboBox cmb = (ComboBox)sender;    var comboSelectedValue = cmb.SelectedItem;}问题是我想要的价值在 cmb.SelectedItem.Row.ItemArray[1] 但我无法访问cmb.SelectedItem.Row. 为什么我不能做这么简单的事情：cmb.SelectedItem.Row.ItemArray[1]？问候

Answer 1

我相信您正在将组合框与DataSet. 所以你可以这样做：

DataRow dataRow = dataSet.Select(string.Format("FieldName = '{0}'",     ComboBox.SelectedValue.ToString()))[0];

if (ComboxBox.SelectedValue != null)

{

// can use fields like 

String text = dataRow[“fieldName”].ToString();

}

else

{ //something wrong

}

}

Answer 2

您选择的项目类型是 DataRowView 因此您需要将 SelectedItem 转换为：

private void cboCustomerType_SelectedIndexChanged(object sender, EventArgs e)

{

    // A combobox with nothing selected will have a SelectedIndex of -1

    if (cboCustomerType.SelectedIndex > -1)

    {

        // Cast SelectedItem to DataRowView

        DataRowView item = cboCustomerType.SelectedItem as DataRowView;

        if (item != null)

        {

            // Access the data in column 1 of the selected row

            string value = item[1].ToString();

        }

    }

}