Handling file explorer in C# How to change to "All Files" option

Question

I'm trying to handle a file explorer in C# but I don't know how to select the "All Files" option

I've been successful in typing a file path into the file name text box and I'm able to press the OK button. But I can't select the file if I can't filter by "All Files"

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System.Windows.Forms.SendKeys.SendWait("{ENTER}");

Answer 1

You don't have to use SendKeys. You use the FileName property to populate the input field and use the FilterIndex property to select "All Files" on your OpenFileDialog instance.

var fileContent = string.Empty;
var filePath = string.Empty;

using (OpenFileDialog openFileDialog = new OpenFileDialog())
{
    openFileDialog.InitialDirectory = "c:\\";
    openFileDialog.FileName = "Your filename"; // Sets the file name input
    openFileDialog.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
    openFileDialog.FilterIndex = 2; // Sets filter to 'All Files'
    openFileDialog.RestoreDirectory = true;

    if (openFileDialog.ShowDialog() == DialogResult.OK)
    {
        //Get the path of specified file
        filePath = openFileDialog.FileName;

        //Read the contents of the file into a stream
        var fileStream = openFileDialog.OpenFile();

        using (StreamReader reader = new StreamReader(fileStream))
        {
            fileContent = reader.ReadToEnd();
        }
    }
}

MessageBox.Show(fileContent, "File Content at path: " + filePath, MessageBoxButtons.OK);