How to select entity lambda query WPF in C#?

Question

1.00/5 (2 votes)

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I want to select table one column.

What I have tried:

I error is:

return entities.SchoolTable.Select(x=>x.Schoolname);

//schoolname string to bool error. And I dont take schoolname this lambda expression.

Posted 1-Aug-19 9:26am

StudentSC

Updated 20-Aug-19 8:27am

v2

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Comments

Benktesh Sharma 1-Aug-19 16:39pm

Can you include the structure of SchoolTable?

[no name] 1-Aug-19 16:54pm

Char(50),char(50),int => name,address,telephone

So,I want to write label=Schoolname

Dave Kreskowiak 1-Aug-19 18:08pm

OK, what in that table descriptor says "SchoolName"? Hint: none. It's "name".

[no name] 1-Aug-19 18:13pm

Hello.Ishort name it was writing.So Database table name is SchoolName,SchoolAddress,SchoolTelephone.

[no name] 2-Aug-19 3:22am

I think you want to make SchoolName "public" ... and with a "getter" ... and maybe a "first or default" query since you're return a string ... and maybe a where clause ... and maybe you should change your handle ...

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Maciej Los · Answer 1 · 2019-08-12T02:21:00

Solution 1

If you want to get single name of school, this statement is incorrect:

C#

entities.SchoolTable.Select(x=>x.SchoolName);

To be able to get single value, use this:

C#

entities.SchoolTable
    .Where(x=>x.SchoolName=="some school name")
    .Select(x=>x.SchoolName)
    .SingleOrDefault();

Posted 12-Aug-19 2:21am

Maciej Los