System.Data.SqlClient v4.9.0 Source: System.Data.SqlClient.notsupported.cs 获取或设置用于打开 SQL Server 数据库的字符串。 C#复制 publicoverridestringConnectionString {get;set; } 属性值 String 连接字符串,其中包含源数据库名称和建立初始连接所需的其他参数。 默认值为一个空字符串。
As with arithmetic operations that are performed on NULL values, when a NULL value is added to a known value the result is typically an unknown value, a string concatenation operation performed with a NULL value, should also produce a NULL result....
InvalidOperationException 已提交或回滚事务。 -或 - 连接已断开。 注解 Save方法等效于 Transact-SQL SAVE TRANSACTION 语句。 参数中使用的savePoint值可以是方法的某些实现BeginTransaction的 参数中使用的transactionName值。 保存点提供回滚部分事务的机制。 使用Save方法创建保存点,然后调用Rollback方法回退到保存点,而...
The null elements are also involved in the operation. str1 and str2: required. Values of the STRING type. If the input values are of the BIGINT, DOUBLE, DECIMAL, or DATETIME type, they are implicitly converted into values of the STRING type before calculation. If the input values are ...
<uint32_t zltail> is the offset to the last entry in the list. This allows a pop operation on the far side of the list without the need for full traversal. zltail,记录最后一个entry相对于起始地址的偏移量 <uint16_t zllen> is the number of entries. When there are more than ...
value, a string concatenation operation that is performed with a null value should also produce a null result. However, you can change this behavior by changing the setting of CONCAT_NULL_YIELDS_NULL for the current session. For more information, seeSET CONCAT_NULL_YIELDS_NULL (Transact-SQL)....
OperationCanceledException OutOfMemoryException OverflowException Paramarrayattribute PlatformID Platformnotsupportedexception Predicate<T> Fortschritt<T> Zufällig Bereich RankException ReadOnlyMemory<T> ReadOnlySpan<T>. Enumerator ReadOnlySpan<T> Resolveeventargs Resolveeventhandler Runtimeargumenthandle Runtime...
Join(String, array<Object[]) is a convenience method that lets you concatenate each element in an object array without explicitly converting its elements to strings. The string representation of each object in the array is derived by calling that object's ToString method. ...
System.Data.SqlClient.notsupported.cs 获取或设置用于打开 SQL Server 数据库的字符串。 C#复制 publicoverridestringConnectionString {get;set; } 属性值 String 连接字符串,其中包含源数据库名称和建立初始连接所需的其他参数。 默认值为一个空字符串。
The first element in value to use. count Type:System.Int32 The number of elements in value to use. Return Value Type:System.String A string that consists of the strings in value delimited by the separator string. -or- String.Emptyif count is zero, value has no elements, or separator an...