我是ASP.NET新手,我正在學習一個教程來創建一個登錄頁面。但是,從nchar(10)
切換到uniqueidentifier
甚至將字符限制增加到50時,我無法更新表格,也無法保存它。這是我收到的錯誤下面誰能幫我解決這個問題?Visual Studio SQL Server表不更新
CREATE TABLE [dbo].[Table]
(
[Id] UNIQUEIDENTIFIER NULL,
[Username] NCHAR (20) NULL,
[Password] NCHAR (20) NULL,
[Email] NCHAR (50) NULL,
[Country] NCHAR (20) NULL
);
改變[DBO] [表] ...
錯誤:
SQL72014: .Net SqlClient Data Provider:
Msg 8169, Level 16, State 2, Line 1
Conversion failed when converting from a character string to uniqueidentifier.SQL72045: Script execution error. The executed script:
ALTER TABLE [dbo].[Table] ALTER COLUMN [Id] UNIQUEIDENTIFIER NULL;An error occurred while the batch was being executed.
數據類型不匹配。使用Guid數據類型作爲C#中與sql中的Id相對應的屬性 – NoSaidTheCompiler
當您調試時,您嘗試更新的ID列的值是多少? – Seano666
嘗試將Guid.NewGuid()傳遞給您的ID,但我不建議這樣做,因爲您可以從Sql更改您的Id屬性。將RowGuid屬性設置爲true ..然後在創建時不必從ASP.NET傳遞一個ID –