How can we declare application variable.

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Hi friends,
Good Morning.
Today i am back with one more problem.

how can we declare application level variable?

My client download a file.
the download file name format is such like this

abc_ABC_DDMMYYY1

as you can see after date there is a variable 1.
every time when my client download file.this variable need to get increment.

i want to add check on date.that when date get changed.this variable set to 1.
and again whenever my client download a file.this variable must increment its value.

how can i do this...

for Example
1st time file download with name...

abc_ABC_DDMMYYY1

2nd time
abc_ABC_DDMMYYY2

3rd time
abc_ABC_DDMMYYY3.

so how can i do this?

Posted 28-May-12 21:28pm

prince_rumeel

Updated 28-May-12 21:32pm

v2

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Umer Aziz Malik · Accepted Answer · 2012-05-28T22:01:00

To declare an application wide variable, declare it in you app.config file

XML

<appSettings>
    <!-- Your variable goeas here as under -->
    <add key="your_variable_name" value="your_variable_value"/>
</appSettings>

To get your variable in code:

C#

string YourVariable= ConfigurationManager.AppSettings["your_variable_name"];

I hope this is what you were asking and that this answer helps :)

Edit: Added way to edit app.config file

C#

// Open App.Config of executable
System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
// Add an Application Setting.
config.AppSettings.Settings.Remove("your_variable_name");
your_variable_new_value = your_variable_value + 1;
config.AppSettings.Settings.Add("your_variable_name", your_variable_new_value);
// Save the configuration file.
config.Save(ConfigurationSaveMode.Modified);
// Force a reload of a changed section.
ConfigurationManager.RefreshSection("appSettings");

Source: How to change app.config file at runtime[^]