C# 将所有用户输入保存到某种数据库或 smth

Question

I have just started programming C# codes and I'm enjoying typing my own little windows form app.

Screenshots:

Its written in C#. It basically takes an user Input, called "Kassenbestand", - "Ausgaben" + "Einnahmen" and gives out an calculated € value at "End Bestand". So very simple.

I have got two questions:

First:

I would like to create a button to save ALL the input he does, so he can save and open it afterwords, in case he forgot something.

As i wrote, I'm very new, so what do i have to do. I saw a lot of stuff with database etc. but maybe one of you professionals can support me better and explain me ? :)

Second question:

I wrote an saving function, to make an screenshot so he can print out all the stuff he wants. But he needs to cut off useless borders etc. Is there a smoother way to capture the Form and print it out? I read a lot of PrintDocument function etc. Any tips ?

Answer 1

To save your user inputs I would suggest to save them in a .csv-file.

Writing a csv file:

        StreamWriter sw = File.AppendText(@"C:\Test\kassenbestand.csv");
        string header = "Datum;Kassenbestand;Ausgaben;Einnahmen";
        sw.WriteLine(header);
        //Write your Data
        string line = string.Format("{0};{1};{2};{3}", DateTime.Today.ToShortDateString(), 550, 400, 600);
        //...
        //...
        //...
        sw.Close();

Reading a csv file:

        StreamReader sr = new StreamReader(@"C:\Test\kassenbestand.csv");
        sr.ReadLine();//skip the header
        while (sr.Peek() != -1)
        {
            string line1 = sr.ReadLine();
            string[] splitted = line1.Split(';');
            // splitted[0] Datum
            // splitted[1] Kassenbestand
            // ...
        }
        sr.Close();

For taking a screenshot of your window you can use this function:

    private System.Drawing.Bitmap TakeScreenshot()
    {
        int StartX, StartY;
        int Width, Height;
        StartX = 0;
        StartY = 0;
        Width = Convert.ToInt32(this.Width);
        Height = Convert.ToInt32(this.Height);
        System.Drawing.Bitmap Screenshot = new System.Drawing.Bitmap(Width, Height);
        System.Drawing.Graphics G = System.Drawing.Graphics.FromImage(Screenshot);
        G.CopyFromScreen(StartX, StartY, 0, 0, new System.Drawing.Size(Width, Height));
        G.Dispose();
        return Screenshot;
    }

To save it you only need to save your bitmap:

       System.Drawing.Bitmap bitmap = TakeScreenshot();
       bitmap.Save(@"C:\Test\screenshot.png");
       bitmap.Dispose();