Enable button on only text file select

Question

Hi I want to how to enabled button when only select .txt file from browse openFileDialog window . I am using this code on browse button click . private void btnBrowse_Click(object sender RoutedEventArgs e) { Microsoft.Win32.OpenFileDialog openFileDialog = new Microsoft.Win32.OpenFileDialog(); openFileDialog.DefaultExt = .txt; openFileDialog.Filter = Text files (*.txt)|*.txt|All files (*.*)|*.*; openFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); result = openFileDialog.Filter; if (openFileDialog.ShowDialog() == true) //Open file dialog window { txtpath = openFileDialog.FileName; FileNameTextBox.Text = txtpath; btnCompaire.IsEnabled = true; openFileDialog. } } Only for select .txt file . if other any file [.pptpdf...etc] then disabled this button Thanks

Ramesh Palanivel · Answer

Hi Anirudha try the below code to check the file extension string ext = Path.GetExtension(OpenFileDialog1.FileName); if(!ext.equals(txt)) { btnCompaire.IsEnabled = false; }

Aniruddha Acharya · Answer

Hi Ramesh  I got it another solution  Thanks private void btnBrowse_Click(object sender RoutedEventArgs e) { Microsoft.Win32.OpenFileDialog openFileDialog = new Microsoft.Win32.OpenFileDialog(); openFileDialog.DefaultExt = .txt; openFileDialog.Filter = Text files (*.txt)|*.txt|All files (*.*)|*.*; openFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); result = openFileDialog.Filter; if (openFileDialog.ShowDialog() == true) //Open file dialog window { txtpath = openFileDialog.FileName; FileNameTextBox.Text = txtpath; string ext = System.IO.Path.GetExtension(txtpath); if (ext.ToUpper() == .TXT) { btnCompaire.IsEnabled = true; } } }

Ramesh Palanivel · Answer

Hi Anirudha Please try this code private void btnBrowse_Click(object sender RoutedEventArgs e) { OpenFileDialog openFileDialog1 = new OpenFileDialog(); openFileDialog1.InitialDirectory = @ C:\ ; openFileDialog1.Title = Browse Text Files ; openFileDialog1.CheckFileExists = true ; openFileDialog1.CheckPathExists = true ; openFileDialog1.DefaultExt = txt ; openFileDialog1.Filter = Text files (*.txt)|*.txt|All files (*.*)|*.* ; openFileDialog1.FilterIndex = 2; openFileDialog1.RestoreDirectory = true ; openFileDialog1.ReadOnlyChecked = true ; openFileDialog1.ShowReadOnly = true ; if (openFileDialog1.ShowDialog() == DialogResult.OK) { btnCompaire.IsEnabled= true ; string ext=Path.GetExtension(openFileDialog1.FileName); if (!exe.equals( txt )) { btnCompaire.IsEnabled= false ; } } }

Aniruddha Acharya · Answer

Hi Ramesh  It's working but my issue is only select .txt file then enable butoon . not required  enable button on select .pdf  .csv ....etc file. Only select .txt file then enable button . Example : select abc.txt from openFileDialog window then enable button. Thanks.