如何插入SMALLDATETIME值數據的基礎上柱

Question

我有一個從用戶表所示：

Id int Unchecked 
Name varchar(50) Checked 
EmailAddress varchar(200) Unchecked 
Host varchar(250) Unchecked 
Port int Unchecked 
POPHost varchar(250) Checked 
POPPort int Checked 
Password varchar(50) Unchecked 
CreatedDate smalldatetime Unchecked 
user_id int Unchecked 
EnableSSL bit Unchecked 
Count int Unchecked 
SentDateTime smalldatetime Checked 
MaxCount int Checked 

，這是存儲進程內爲每個選擇更新特定字段作爲像：

USE [EASYMAIL] 
GO 
/****** Object: StoredProcedure [dbo].[UpdateFromUserField] Script Date: 20/02/2017 8:35:24 PM ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
ALTER PROCEDURE [dbo].[UpdateFromUserField] 
(
    @fromuser_id int, 
    @var_name varchar(25), 
    @var_value varchar(100) 
) 

AS 
BEGIN 
    SET NOCOUNT ON; 
    IF @var_name = 'Name' 
     UPDATE [dbo].[tbl_From_master] SET [Name] =CAST(@var_value AS TEXT) WHERE (Id=@fromuser_id) 
    ELSE IF @var_name = 'EmailAddress' 
     UPDATE [dbo].[tbl_From_master] SET [EmailAddress] = CAST(@var_value AS TEXT) WHERE (Id=@fromuser_id) 
    ELSE IF @var_name = 'Host' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [Host] = CAST(@var_value AS TEXT) WHERE (Id=@fromuser_id) 
    ELSE IF @var_name = 'Port' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [Port] = CAST(@var_value AS INT) WHERE (Id = @fromuser_id) 
     ELSE IF @var_name = 'POPHost' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [POPHost] = CAST(@var_value AS TEXT) WHERE (Id=@fromuser_id) 
    ELSE IF @var_name = 'POPPort' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [POPPort] = CAST(@var_value AS INT) WHERE (Id = @fromuser_id) 
    ELSE IF @var_name = 'EnableSSL' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [EnableSSL] = CAST(@var_value AS BIT) WHERE (Id = @fromuser_id) 
    ELSE IF @var_name = 'SentDateTime' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [SentDateTime] = SUBSTRING(@var_value,4,3) + LEFT(@var_value,3) + RIGHT(@var_value,4) WHERE (Id = @fromuser_id) 
    ELSE IF @var_name = 'Count' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [Count] = CAST (@var_value AS INT) WHERE (Id=@fromuser_id) 
    ELSE IF @var_name = 'MaxCount' 
     UPDATE [EASYMAIL].[dbo].[tbl_From_master] SET [MaxCount] = CAST (@var_value AS INT) WHERE (Id=@fromuser_id) 
END 

然而，它變得對執行時間如下錯誤：

USE [EASYMAIL] 
GO 

DECLARE @return_value int 

EXEC @return_value = [dbo].[UpdateFromUserField] 
     @fromuser_id = 1, 
     @var_name = N'SentDateTime', 
     @var_value = N'2017-02-20 8:32:12' 

SELECT 'Return Value' = @return_value 

GO 

錯誤：

Msg 295, Level 16, State 3, Procedure UpdateFromUserField, Line 26 
Conversion failed when converting a character string to smalldatetime data type. 

這裏有什麼錯誤？ 請幫我

更新

The conversion of a varchar data type to a smalldatetime data type resulted in an out-of-range value. 
The statement has been terminated. 

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Data.SqlClient.SqlException: The conversion of a varchar data type to a smalldatetime data type resulted in an out-of-range value. 
The statement has been terminated. 

Source Error: 


Line 618: public int UpdateFromUserField([global::System.Data.Linq.Mapping.ParameterAttribute(DbType="Int")] System.Nullable<int> fromuser_id, [global::System.Data.Linq.Mapping.ParameterAttribute(DbType="VarChar(25)")] string var_name, [global::System.Data.Linq.Mapping.ParameterAttribute(DbType="VarChar(100)")] string var_value) 
Line 619: { 
Line 620:  IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), fromuser_id, var_name, var_value); 
Line 621:  return ((int)(result.ReturnValue)); 
Line 622: } 

Source File: e:\EASYMAIL_off\EASYMAIL\App_Code\DataClasses.designer.cs Line: 620 

Answer 1

變化：

SET [SentDateTime] = SUBSTRING(@var_value,4,3) + LEFT(@var_value,3) + RIGHT(@var_value,4) 

通過：

SET [SentDateTime] = CAST(LEFT(@var_value,4) + SUBSTRING(@var_value,6,2) + SUBSTRING(@var_value,9,2)) AS SMALLDATETIME) 

或者：

SET [SentDateTime] = CAST(@var_vaule AS SMALLDATETIME)