To display the file-name that was chosen when the form is closed and opened.

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Hi i wanted to display the file name inside a textbox after the form is closed and then opened.I have an application with 2 forms.I can open Form 2 from form 1 and close it also .In Form 2 i have a textbox where the file name appears after i browse a file and select it .But when i close the file and open it the textbox is empty.I tried to use a public string variable within the form2 class and use that string while i load the form but it shows empty textbox .How could i retain the file-name till the application is closed .

Posted 20-May-14 23:42pm

Member 10408516

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lukeer 21-May-14 5:53am

Improve your question to show the relevant code part (remember to enclose it it such tags:
<pre lang="c#">YourCodeHere();</pre>
With Form2's code, I expect us to find why the public string (better use a property) didn't work.

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Manikandan10 · Accepted Answer · 2014-05-21T03:10:00

Use static classes instead for data shared between forms. Let the above code be the same. Add a new class using "Project->Add Class..". Then make the class static by adding static before class. Then add the FileName variable which should be both public and static.

Let the class name be "Shared". The class should look like the following:

C#

public static class Shared
{
     public static string FileName;
}

Then in the constructor of Form2 change

C#

this.textBox1.Text = Filename1;

to

C#

this.textBox1.Text = Shared.FileName;

And then in the method "button1_Click" change:

C#

Filename1 = openFileDialog1.FileName;

to

C#

Shared.FileName = openFileDialog1.FileName;

Delete these lines as they are no longer needed:

C#

private string Filename;
public string Filename1
{
get { return Filename; }
set { Filename = value; }
}

*dan!sh* · Accepted Answer · 2014-05-21T00:23:00

Solution 1

There are plenty of ways through which you can share data between forms. You can make use of constructors, properties and event handlers.

Here[^] is some sample code to get you started.

Posted 21-May-14 0:23am

dan!sh

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Member 10408516 21-May-14 7:51am

private string Filename;
public string Filename1
{
get { return Filename; }
set { Filename = value; }
}
public Form2()
{
InitializeComponent();
this.textBox1.Text = Filename1;

}
private void button1_Click(object sender, EventArgs e)
{
result = openFileDialog1.ShowDialog();
openFileDialog1.AddExtension = true;
openFileDialog1.Title = "Open peripheral programming sequence file";
openFileDialog1.Filter = "Sequence XML File (*.xml)|*.xml";

openFileDialog1.RestoreDirectory = true;

if (result == DialogResult.OK)
{
this.textBox1.Text = openFileDialog1.FileName;
Filename1 = openFileDialog1.FileName;
}
}

Thankyou.I tried using the property method as shown above but not sure if i have done it in the correct way but the filename was not shown in the textbox1 when the form2 was opened .Is there any method where the string is not passed through the constructor but it is stored in a string variable that can be accessed until the application is stopped i.e even when the form 2 is closed we should be able to access that string variable .

dan!sh 21-May-14 8:17am

See you are creating the string variable in form which will not exist once form is closed. You can refer to this article for better details: http://www.codeproject.com/Articles/325000/Sharing-data-among-Windows-Forms