将Session字符串传递给sql作为uniqueidentifier

Question

I have a session variable which holds a guid string:

Session["Company_Id"] = "4B5E95A7-745A-462F-AE53-709A8583700A"; 

I want to pass this as a parameter to SQL Server:

So add the parameter:

cmd.Parameters.Add("@Company_Id", System.Data.SqlDbType.UniqueIdentifier).Value = Session["Company_Id"];

When the Stored Procedure gets called I get:

System.InvalidCastException: 'Failed to convert parameter value from a String to a Guid.'

Appreciate any guidance ;-)

Answer 1

您可以执行以下操作：

cmd.Parameters.Add("@Company_Id", System.Data.SqlDbType.UniqueIdentifier).Value = Guid.Parse(Session["Company_Id"]);

Answer 2

You can pass it as Guid by using Guid.Parse method which would be convert your string representation of your Guid to Guid :

Guid.Parse(Session["Company_Id"].ToString());

Your command code would become:

cmd.Parameters.Add("@Company_Id", System.Data.SqlDbType.UniqueIdentifier).Value = Guid.Parse(Session["Company_Id"].ToString());