从C中的SQL捕获引用约束异常#

try
{
   //Execute delete statement
}
catch (SqlException sqlEx)
{
   //Handle exception
}
finally
{
   //Close connection
}

SqlException SqlException.Number here

ConstraintException

using System.Data;

try
{
  // code that violates constraint
}
catch (ConstraintException exc)
{
  // build output message you wish using exc.Message and other fields,
  // return cleanly or rethrow as your own exception
}