I am getting Error in following code,how to solve this error

Question

0.00/5 (No votes)

See more:

ERROR IS: "LINQ to Entities does not recognize the method 'Int32 ToInt32(System.String)' method, and this method cannot be translated into a store expression."

C#

string  adID = txtSearchRegNo.Text;
//  int adID =Convert.ToInt32(txtSearchRegNo.Text);

var list = (from p in db.AdmissionDetails join s in db.StudentDetails on p.AdmissionId equals s.AdmissionId
            where p.AdmissionId==adID
            select new
            {
               RegNo = p.AdmissionId ,
               Student_Name = p.StudentFName +" "+ p.StudentMName +" "+ p.StudentLName,
               Mother_Name = p.MotherFanme,
               Cast = p.Cast,
               s.Nationality,
               Place_Of_Birth= p.PlaceofBirth,
               Mother_Tongue = s.MotherTongue,
               Date_Of_Birth = p.BirthDate,
             }).ToList();

Posted 16-Mar-15 23:51pm

Member 11227519

Updated 16-Mar-15 23:54pm

phil.o

v2

Add a Solution

Comments

Santosh K. Tripathi 17-Mar-15 6:05am

i would like to suggest to you "Place client side validation for txtSearchRegNo".
this will help to reduce error.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

phil.o · Answer 1 · 2015-03-16T23:57:00

Convert should not be your preferred way of getting an integer value from a user-input string.

User inputs should ba validated at all times. THe best way for that is to use the TryParse method. This way:

C#

int adID;
if (!int.TryParse(txtSearchRegNo.Text, out adID) {
   throw new ArgumentException("Entered text is not a valid integer representation.");
}
// Here you can make whatever you want with adID variable

Hope this helps.