本文整理汇总了C#中SqlCommand.Prepare方法的典型用法代码示例。如果您正苦于以下问题：C# SqlCommand.Prepare方法的具体用法？C# SqlCommand.Prepare怎么用？C# SqlCommand.Prepare使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SqlCommand的用法示例。
在下文中一共展示了SqlCommand.Prepare方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: CancelAndDisposePreparedCommand
//InvalidOperationException from conenction.Dispose if that connection has prepared command cancelled during reading of data
private static void CancelAndDisposePreparedCommand(string constr)
{
int expectedValue = 1;
using (var connection = new SqlConnection(constr))
{
try
{
// Generate a query with a large number of results.
using (var command = new SqlCommand("select @P from sysobjects a cross join sysobjects b cross join sysobjects c cross join sysobjects d cross join sysobjects e cross join sysobjects f"
, connection))
{
command.Parameters.Add(new SqlParameter("@P", SqlDbType.Int) { Value = expectedValue });
connection.Open();
// Prepare the query.
// Currently this does nothing until command.ExecuteReader is called.
// Ideally this should call sp_prepare up-front.
command.Prepare();
using (var reader = command.ExecuteReader(CommandBehavior.SingleResult))
{
if (reader.Read())
{
int actualValue = reader.GetInt32(0);
Assert.True(actualValue == expectedValue, string.Format("Got incorrect value. Expected: {0}, Actual: {1}", expectedValue, actualValue));
}
// Abandon reading the results.
command.Cancel();
}
}
}
finally
{
connection.Dispose(); // before the fix, InvalidOperationException happened here
}
}
}