Operator '+' cannot be applied to operands of type 'method group' and string [error]

Question

1.00/5 (2 votes)

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Somehow for this code I'm getting an error, any workaround?

C#

protected void calArticles_SelectionChanged(object sender, EventArgs e)
{
    SqlDataSource1.ConnectionString = 
        System.String.Concat(
        "SELECT [Timestamp], [Subject], [EntryText] FROM [Article] WHERE [Timestamp] = "
        ,calArticles.SelectedDate.ToString + ";");
        
}

Error Message:
Error 2 Operator '+' cannot be applied to operands of type 'method group' and 'string' c:\inetpub\wwwroot\Jon's Couch\Articles.aspx.cs 24 14 http://localhost/Jon's Couch/

:confused:

Posted 27-Aug-10 12:06pm

jon-80

Updated 27-Aug-10 12:40pm

AspDotNetDev

v3

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AspDotNetDev 27-Aug-10 18:40pm

You've used PRE tags correctly in the past, but you didn't for this post. Why is that? In any event, I've fixed it for you... to see what I did, click "Improve Question" and you will see the PRE tag and BLOCKQUOTE tag I used to format your question nicely.

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Christian Graus · Accepted Answer · 2010-08-27T12:09:00

Solution 1

ToString is a method. Use () to call a method, as in ToString(). Buy a C# book and read it. You should also not be string mashing SQL in your presentation layer, not if you want to write scalable and maintainable code.

Posted 27-Aug-10 12:09pm

Christian Graus

Updated 27-Aug-10 12:16pm

v2

Comments

Shawn Aune 21-Nov-13 10:02am

Dear, Christian Graus... I recommend you go buy a book on manners and read it.

Christian Graus 23-Nov-13 3:18am

So you think it's good manners to ask the most basic of questions without first learning anything, including what the most basic error messages mean ? Wow.

jon-80 28-Aug-10 8:42am

"You should also not be string mashing SQL in your presentation layer, not if you want to write scalable and maintainable code."
I agree, it's bad design, however, this is just a personal blog, so I'm taking a minimalist approach to prove the concept works :) How would you suggest passing the SQL statements to the database?