Question

我有一个来自用户表的内容：

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

这是stored-proc，用于按照以下选项更新特定字段：

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

但是，执行时间会出错，如：

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

错误：

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

这里有什么错误？请帮帮我

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

变化：

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

人：

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)

如何将smalldatetime值插入数据库列

1 个答案: