Type Conversion from Decimal to String

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total = Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, AchievedPer));
string stotal = Convert.ToDecimal(total).ToString() ;

lblTotal.Text = stotal;//string Label.text=(local variable)string//Conversion failed..

Please let me know,why I'm unable to get the result at lblTotal.Text..?

Posted 20-Mar-14 18:31pm

Gladiator3

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ravikhoda 21-Mar-14 0:44am

if "Conversion failed.." is your error try and check what value you are getting from DataBinder.Eval(e.Row.DataItem, AchievedPer). it looks like this value is not convertable from string to decimal in the first line.

Gladiator3 21-Mar-14 1:26am

Seems true, but, I need to get a solution..

syed shanu 21-Mar-14 0:52am

Check for empty and null value here total = Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, AchievedPer));

Gladiator3 21-Mar-14 1:31am

Yes, But how can u check for decimal value=null, it would obviously show an error, 'The result of the expression is always 'true' since a value of 'type' decimal is never equal to null of type 'decimal'? '

Ankur^\m/ 21-Mar-14 1:07am

Why are you doing so many conversions? just below line of code will do the work;
lblTotal.Text = Convert.ToString(DataBinder.Eval(e.Row.DataItem, AchievedPer));

Gladiator3 21-Mar-14 1:25am

I had tried that earlier...still the error persists..
Object reference not set to an instance of an object.

For your kind information "AchievedPer" value is of decimal datatype.

Any other solution?

Ankur^\m/ 21-Mar-14 1:52am

The error means the value of AchievedPer is null. Attach a debugger and add a watch for DataBinder.Eval(e.Row.DataItem, AchievedPer). You will find that it is null.

Gladiator3 22-Mar-14 0:24am

could u share u mail id...?
I had placed a debugger and I did get my required solution,for variable 'total'.

Ankur^\m/ 24-Mar-14 1:38am

May I know why do you need my email id for? You can post anything here.

2 solutions

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ravikhoda · Answer 1 · 2014-03-20T19:35:00

Solution 2

try decimal.parseexact or tryparse method it may help or from take care from your database query and handle it by usign ISnull('ColumnName','0.0') so if your data it null it will return 0.0 and your conversion to decimal will not affect.

Posted 20-Mar-14 19:35pm

ravikhoda

Peter Leow · Answer 2 · 2014-03-20T19:03:00

Solution 1

You should use Decimal.TryParse Method[^]

++++++++++++++++++++++++++++++++
Example added as requested:

VB

using System;

public class Program
{
    public static void Main()
    {
        string str = "123.45";

        Decimal num;

        if (Decimal.TryParse(str, out num))
            Console.WriteLine(num);
        else
            Console.WriteLine("Unable to parse '{0}'.", str);
    }
}

Posted 20-Mar-14 19:03pm

Peter Leow

Updated 20-Mar-14 20:05pm

v2

Comments

Gladiator3 21-Mar-14 1:41am

Hi Peter,
Could you please, explain explicitly in web application, as I see your example in a console application.

Peter Leow 21-Mar-14 2:05am

Example added.

Gladiator3 21-Mar-14 2:18am

Hi Peter,
Could you please, explain explicitly in web application.

Peter Leow 21-Mar-14 2:24am

What web application? This is generic. You can adapt this in the code behind of asp.net or in winform. I think I have already provided you the solution.

lukeer 21-Mar-14 2:32am

The console part is just for showing the result to the user. You have to adapt this to your situation. It's the parsing that should be shown here.

Type Conversion from Decimal to String

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Type Conversion from Decimal to String

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