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VB 2010 Express saving and opening text file
Posted on 2011-03-09
Hey i have a few fields setup as a form example:
UsernameTextbox.Text
EmailTextbox.Text
CountryComboBox.Text
------
I have a save button on the form screen called Button1.
When this button is pressed, i want the user to be able to save the above data to a file anywhere they want on their harddrive and name it whatever they want.
-------
I also have another button on the screen called Button2.
When this button is pressed, i want the user to be able to load data which was saved before.
If possible the file extension should change to something like .nme rather than .txt this will help error handling as users should only be able to load/save files with that extension.
UsernameTextbox.Text
EmailTextbox.Text
CountryComboBox.Text
------
I have a save button on the form screen called Button1.
When this button is pressed, i want the user to be able to save the above data to a file anywhere they want on their harddrive and name it whatever they want.
-------
I also have another button on the screen called Button2.
When this button is pressed, i want the user to be able to load data which was saved before.
If possible the file extension should change to something like .nme rather than .txt this will help error handling as users should only be able to load/save files with that extension.
[X]
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7 Comments
Active today
Have a look at the SaveFileDialog and OpenFileDialog components:
http://msdn.microsoft.com/en-us/library/system.windows.forms.savefiledialog.aspx
http://msdn.microsoft.com/en-us/library/system.windows.forms.openfiledialog.aspx
http://msdn.microsoft.com/en-us/library/system.windows.forms.savefiledialog.aspx
http://msdn.microsoft.com/en-us/library/system.windows.forms.openfiledialog.aspx
Dim myStream As Stream
Dim saveFileDialog1 As New SaveFileDialog()
saveFileDialog1.Filter = "net manager e (*.nme)|*.nme"
saveFileDialog1.FilterIndex = 2
saveFileDialog1.RestoreDirectory = True
If saveFileDialog1.ShowDialog() = DialogResult.OK Then
myStream = saveFileDialog1.OpenFile()
If (myStream IsNot Nothing) Then
' Code to write the stream goes here.
End If
End If
When i click the button it loads up with the save dialog, with a single extension as i set it, how do i write my values into this file?
On another note, i have another label called done1. this labels value is default set to NO this should also be stored on the text/nme file in my case.
But i have another command button called command2 on another form, when clicked it should update the value of done1 to YES, this should update the form aswell as the text/nme file which the user has saved before when first creating the file.
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Active today
>> When this button is pressed, i want the user to be able to save the above data to a file anywhere they want on their harddrive and name it whatever they want.
SaveFileDialog is the component that would give you this functionality. It displays a dialog box to the user which allows him to navigate his filesystem and select a location and filename to save a file as. There is a member called Filename which you would pass to some Stream object in order to write the data to be saved to a file.
>> When this button is pressed, i want the user to be able to load data which was saved before.
OpenFileDialog is the component that would give you this functionality. It displays a dialog box to the user which allows him to navigate his filesystem and select a file to open. There is a member called Filename which is what you would pass to some Stream object in order to actually get the data from the file.
SaveFileDialog is the component that would give you this functionality. It displays a dialog box to the user which allows him to navigate his filesystem and select a location and filename to save a file as. There is a member called Filename which you would pass to some Stream object in order to write the data to be saved to a file.
>> When this button is pressed, i want the user to be able to load data which was saved before.
OpenFileDialog is the component that would give you this functionality. It displays a dialog box to the user which allows him to navigate his filesystem and select a file to open. There is a member called Filename which is what you would pass to some Stream object in order to actually get the data from the file.
I have already Done that?
When i click the button it loads up with the save dialog, with a single extension as i set it, how do i write my values into this file?
On another note, i have another label called done1. this labels value is default set to NO this should also be stored on the text/nme file in my case.
But i have another command button called command2 on another form, when clicked it should update the value of done1 to YES, this should update the form aswell as the text/nme file which the user has saved before when first creating the file.
When i click the button it loads up with the save dialog, with a single extension as i set it, how do i write my values into this file?
On another note, i have another label called done1. this labels value is default set to NO this should also be stored on the text/nme file in my case.
But i have another command button called command2 on another form, when clicked it should update the value of done1 to YES, this should update the form aswell as the text/nme file which the user has saved before when first creating the file.
Active today
Here's the very basics...I'd recommend using XML serialization instead though:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Using sfd As New SaveFileDialog
sfd.Filter = "Net manager e (*.nme)|*.nme|All files (*.*)|*.*"
sfd.RestoreDirectory = True
If sfd.ShowDialog = Windows.Forms.DialogResult.OK Then
Try
Using sw As New System.IO.StreamWriter(sfd.FileName, False)
sw.WriteLine(UsernameTextbox.Text)
sw.WriteLine(EmailTextbox.Text)
sw.WriteLine(CountryComboBox.SelectedItem)
End Using
Catch ex As Exception
MessageBox.Show(ex.ToString, "Error Saving Data", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End If
End Using
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Using ofd As New OpenFileDialog
ofd.Filter = "Net manager e (*.nme)|*.nme|All files (*.*)|*.*"
ofd.RestoreDirectory = True
If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then
Try
Using sr As New System.IO.StreamReader(ofd.FileName)
UsernameTextbox.Text = sr.ReadLine
EmailTextbox.Text = sr.ReadLine()
CountryComboBox.SelectedItem = sr.ReadLine()
End Using
Catch ex As Exception
MessageBox.Show(ex.ToString, "Error Loading Data", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End If
End Using
End Sub
End Class
Thank you so much i was looking for this all of this time EmailTextbox.Text = sr.ReadLine() :),
it should help me with this .
"But i have another command button called command2 on another form, when clicked it should update the value of done1 to YES, this should update the form aswell as the text/nme file which the user has saved before when first creating the file."
all i will do is write to a text file,then load a text file, at the time of loading i will get the path to the file, so when it comes to writing the values for done1 that path can be used :) thank you
it should help me with this .
"But i have another command button called command2 on another form, when clicked it should update the value of done1 to YES, this should update the form aswell as the text/nme file which the user has saved before when first creating the file."
all i will do is write to a text file,then load a text file, at the time of loading i will get the path to the file, so when it comes to writing the values for done1 that path can be used :) thank you
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