is this correct syntax

Question

1.00/5 (3 votes)

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if text box value not given defaultly take value = "0"

not converted date to "0"

C#

if (txtDate.Text.ToString() == "")
               txtDate.Text. = "0";

Posted 13-May-12 19:36pm

2011999

Updated 14-May-12 0:45am

v4

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Comments

Sergey Alexandrovich Kryukov 14-May-12 1:47am

Makes no sense. And what, too lazy to check up syntax? With documentation or using simple logical thinking?
--SA

4 solutions

Solution 3

Hi,

C#

if(txtOSIInterstFromBank.Text==String.Empty)
{
        //Do What you want to do here....
}

Posted 13-May-12 19:54pm

Rockstar_

Updated 13-May-12 20:00pm

v2

Comments

2011999 14-May-12 6:43am

if (txtDate.Text.ToString() == "")
txtDate.Text. = "0";

is it not converted to '0'

bbirajdar 14-May-12 12:56pm

Will this work , if a user enters a 'space' in the textbox?

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-05-13T19:45:00

Solution 1

No. A compiler will tell you what's wrong. Must be if (someCondition) {/* ... */} else {/* ... */}. Not a mistake in syntax, but not good style: don't use "", use string.Empty.

—SA

Posted 13-May-12 19:45pm

Sergey Alexandrovich Kryukov

Updated 14-May-12 5:41am

v2

Comments

Mohammad A Rahman 14-May-12 21:17pm

Nice

Sergey Alexandrovich Kryukov 14-May-12 22:55pm

Thank you, Mohammad.
--SA

VJ Reddy 15-May-12 4:54am

Good points. 5!

Sergey Alexandrovich Kryukov 15-May-12 11:48am

Thank you, VJ.
--SA

VJ Reddy · Accepted Answer · 2012-05-14T06:23:00

Solution 4

I think the string.IsNullOrWhiteSpace method can be used with .Net 4 or above and string.IsNullOrEmpty method can be used with .Net 2.0 or 3.5.

C#

//For .Net 4 or above
if (string.IsNullOrWhiteSpace(txtDate.Text))
    txtDate.Text = "0";

//For .Net 2.0, 3.5
if (string.IsNullOrEmpty(txtDate.Text.Trim()))
    txtDate.Text = "0";

It is preferable to use string.IsNull... method as it will not throw error when the text to be tested is null. On the other hand text == "" or text == string.Empty throws error if text is null.

Posted 14-May-12 6:23am

VJ Reddy

Updated 14-May-12 21:17pm

v2

Comments

2011999 14-May-12 13:43pm

not working above code

VJ Reddy 14-May-12 14:38pm

It shall work. Please see here
http://msdn.microsoft.com/en-us/library/system.string.isnullorwhitespace.aspx and here
http://msdn.microsoft.com/en-us/library/system.string.isnullorempty.aspx

Mohammad A Rahman 14-May-12 21:17pm

To the point :)
101

VJ Reddy 14-May-12 21:40pm

Thank you, Rahman :)

Sandeep Mewara 15-May-12 10:34am

5!

VJ Reddy 15-May-12 10:41am

Thank you, Sandeep :)

**tanweer** · Accepted Answer · 2012-05-13T19:49:00

Solution 2

not given defaultly means the value is empty then:

C#

if (txtOSIInterstFromBank.Text.Trim() == "")
          txtOSIInterstFromBank.Text = "0";

Posted 13-May-12 19:49pm

tanweer