For Each stringGuid In stringGuids Try Dim newGuid As Guid = Guid.Parse (stringGuid) Console.WriteLine ("Converted {0} to a Guid", stringGuid) Catch e As ArgumentNullException Console.WriteLine ("The string to be parsed is null.")
In respect to this, You should just move the string parsing out of store expression and parse the string to Guid value before using it in the Query. public Student GetStudent (string studentId) { var stdId = Guid.Parse (studentId); var student = this.context.Students.FirstOrDefault (x => x.Id == stdId); return student; } In addition, There are two methods to convert string representation into equivalent Guid. 1) Guid.Parse. public static Guid Parse(){ string input; } This method takes string as an input and returns it's equivalent Guid value. An ArgumentNullException is thrown when input parameter is null and FormatException is thrown when input parameter is in wrong format. Indeed, A span containing the characters representing the GUID to convert. A Guid instance to contain the parsed value. If the method returns true, result contains a valid Guid. If the method returns false, result equals Empty. true if the parse operation was successful; otherwise, false. One may also ask, Microsoft makes no warranties, express or implied, with respect to the information provided here. Converts the string representation of a GUID to the equivalent Guid structure. Converts a read-only character span that represents a GUID to the equivalent Guid structure.
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