String was not recognized as a valid Boolean.how to solve this error?

Question

0.00/5 (No votes)

See more:

Can anyone help?

In this following coding I got this Error "String was not recognized as a valid Boolean" where - " if (Convert.ToBoolean( condition = "<500"))"

C#

public void price()
{
    if (Convert.ToBoolean( condition = "<500"))
    {
        SqlCommand cmd = new SqlCommand("select pro_img,pro_name,price from product where price='" + price_range + "' and status='A' and type='retail'", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        DataList1.DataSource = ds;
        DataList1.DataBind();
    }

}

Posted 21-Nov-11 20:54pm

sathiyak

Updated 21-Nov-11 21:01pm

RaisKazi

v3

Add a Solution

Comments

R. Giskard Reventlov 22-Nov-11 2:55am

No, no one can help with the information you have supplied: you'll need to be more specific and display some code since no one here is telepathic.

2 solutions

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)

OriginalGriff · Answer 1 · 2011-11-21T21:03:00

Solution 1

Try changing the operator:

C#

if (Convert.ToBoolean( condition = "<500"))

Becomes

C#

if (Convert.ToBoolean( condition == "<500"))

In fact, dump the Convert bit altogether:

C#

if (condition == "<500")

Posted 21-Nov-11 21:03pm

OriginalGriff

Comments

R. Giskard Reventlov 22-Nov-11 3:08am

Beat me to it! Take a 5!

RaisKazi 22-Nov-11 3:15am

5ed. My guess of int type was wrong.

RaisKazi · Answer 2 · 2011-11-21T21:08:00

Solution 2

Even your updated details does not provide all the details.

If your condition variable is of int type, then modify your code as below. No need to use Convert.ToBoolean.

C#

if (condition < 500)

Otherwise let us know, what is a Type of condition variable.

Posted 21-Nov-11 21:08pm

RaisKazi

Updated 21-Nov-11 21:09pm

v2

Comments

sathiyak 22-Nov-11 3:10am

i gave condition as string......

RaisKazi 22-Nov-11 3:14am

If "condition" variable is a type of string then please refer Griff's answer(Solution 1).