本文整理匯總了C#中System.Data.DataTable.ColumnChanging事件的典型用法代碼示例。如果您正苦於以下問題：C# DataTable.ColumnChanging事件的具體用法？C# DataTable.ColumnChanging怎麽用？C# DataTable.ColumnChanging使用的例子？那麽, 這裏精選的事件代碼示例或許可以為您提供幫助。您也可以進一步了解該事件所在類System.Data.DataTable的用法示例。
在下文中一共展示了DataTable.ColumnChanging事件的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: DataTableColumnChanging
private static void DataTableColumnChanging()
{
DataTable custTable = new DataTable("Customers");
// add columns
custTable.Columns.Add("id", typeof(int));
custTable.Columns.Add("name", typeof(string));
custTable.Columns.Add("address", typeof(string));
// set PrimaryKey
custTable.Columns[ "id" ].Unique = true;
custTable.PrimaryKey = new DataColumn[] { custTable.Columns["id"] };
// add a ColumnChanging event handler for the table.
custTable.ColumnChanging += new
DataColumnChangeEventHandler(Column_Changing );
// add ten rows
for(int id=1; id<=10; id++)
{
custTable.Rows.Add(
new object[] { id, string.Format(
"customer{0}", id), string.Format("address{0}", id) });
}
custTable.AcceptChanges();
// change the name column in all the rows
foreach(DataRow row in custTable.Rows )
{
row["name"] = string.Format("vip{0}", row["id"]);
}
}
private static void Column_Changing(object sender,
DataColumnChangeEventArgs e )
{
Console.WriteLine(
"Column_Changing Event: name={0}; Column={1}; proposed name={2}",
e.Row["name"], e.Column.ColumnName, e.ProposedValue );
}