How do I create button to save texboxes value into XML and load it back with buttons? C#

Question

0.00/5 (No votes)

See more:

first of all im really new to this and new with c# sorry about my english..well im about to make an application for school project, im creating a simple cashregister app thing..

so i wanted to make a button to save every text/number value in texboxes i've created
the program runs but, im getting this error after click the save button i've created

An unhandled exception of type 'System.ArgumentException' occurred in mscorlib.dll
Absolute path information is required. occurred

at this line

FileIOPermission filePermission =
                    new FileIOPermission(FileIOPermissionAccess.AllAccess, "data.xml");

What I have tried:

form1.cs
save button

private void btnsave_Click_1(object sender, EventArgs e)
       {
           if (File.Exists("data.xml"))
           {
               File.SetAttributes("data.xml", FileAttributes.Normal);
               FileIOPermission filePermission =
                   new FileIOPermission(FileIOPermissionAccess.AllAccess, "data.xml");

               using (FileStream stream = new FileStream("data.xml", FileMode.Create))
               {
                   try
                   {
                       Information info = new Information();
                       info.Data1 = txtBasoSU.Text;
                       info.Data2 = txtBasoC.Text;
                       info.Data3 = txtBasoM.Text;
                       info.Data4 = txtBasoB.Text;
                       info.Data5 = txtMieA.Text;
                       info.Data6 = txtMieAB.Text;
                       info.Data7 = txtServisMinuman.Text;
                       info.Data8 = txtServisMakanan.Text;
                       info.Data9 = txtServisBungkus.Text;
                       info.Data10 = txtTotalSpajak.Text;
                       info.Data11 = txtTotalPajak.Text;
                       info.Data12 = txtTotal.Text;

                       SaveXML.SaveData(info, "data.xml");

                   }
                   catch (Exception ex)
                   {
                       MessageBox.Show(ex.Message);
                   }
               }
           }
       }

load button

private void btnload_Click(object sender, EventArgs e)
        {
            if (File.Exists("data.xml"))
            {
                using (var stream = new FileStream("data.xml", FileMode.Open))
                {
                    var xs = new XmlSerializer(typeof(Information));
                    FileStream read = new FileStream("data.xml", FileMode.Open, FileAccess.ReadWrite);
                    Information info = (Information)xs.Deserialize(read);
                    // FileStream read = new FileStream("data.xml", FileMode.Open, FileAccess.ReadWrite);
                    //Information info = (Information)xs.Deserialize(read);

                    txtBasoSU.Text = info.Data1;
                    txtBasoC.Text = info.Data2;
                    txtBasoM.Text = info.Data3;
                    txtBasoB.Text = info.Data4;
                    txtMieA.Text = info.Data5;
                    txtMieAB.Text = info.Data6;

                    txtServisMinuman.Text = info.Data7;
                    txtServisMakanan.Text = info.Data8;
                    txtServisBungkus.Text = info.Data9;
                    txtTotalSpajak.Text = info.Data10;
                    txtTotalPajak.Text = info.Data11;
                    txtTotal.Text = info.Data12;
                }
            }
        }

information.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace CS_Sistem_Managemen_Restoran
{
    public class Information
    {
        private string data1;
        private string data2;
        private string data3;
        private string data4;
        private string data5;
        private string data6;

        private string data7;
        private string data8;
        private string data9;
        private string data10;
        private string data11;
        private string data12;
        
        
        public string Data1
        {
            get { return data1; }
            set { data1 = value; }
        }

        public string Data2
        {
            get { return data2; }
            set { data2 = value; }
        }
        public string Data3
        {
            get { return data3; }
            set { data3 = value; }
        }

        public string Data4
        {
            get { return data4; }
            set { data4 = value; }
        }

        public string Data5
        {
            get { return data5; }
            set { data5 = value; }
        }

        public string Data6
        {
            get { return data6; }
            set { data6 = value; }
        }

        public string Data7
        {
            get { return data7; }
            set { data7 = value; }
        }

        public string Data8
        {
            get { return data8; }
            set { data8 = value; }
        }

        public string Data9
        {
            get { return data9; }
            set { data9 = value; }
        }

        public string Data10
        {
            get { return data10; }
            set { data10 = value; }
        }

        public string Data11
        {
            get { return data11; }
            set { data11 = value; }
        }

        public string Data12
        {
            get { return data12; }
            set { data12 = value; }
        }

        
    }
}

saveXML.cs

using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.IO;

namespace CS_Sistem_Managemen_Restoran
{
    public class SaveXML
    {
        public static void SaveData(object obj, string filename)
        {
            XmlSerializer sr = new XmlSerializer(obj.GetType());
            TextWriter writer = new StreamWriter(filename);
            sr.Serialize(writer, obj);
            writer.Close();
        }
    }
}

Posted 11-Aug-18 22:32pm

Muhammad nur Ihsan

Updated 11-Aug-18 22:45pm

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2018-08-11T22:45:00

The error is pretty self explanatory, if you look at it.

Absolute path information is required

Is coming on this line:

FileIOPermission filePermission =
                    new FileIOPermission(FileIOPermissionAccess.AllAccess, "data.xml");

Because "data.xml" is a relative path - and it's relative to wherever the current app is running at this precise moment. The DLL doesn't know where that is, or at the very least isn't sure that it knows, so it specifically tests for an absolute location when you specify the file name.

It's a bit like being in a library, and talking to someone on the phone. When you tell them you are reading "this book" that doesn't help them come and look at it because "this book" is a relative address: you need to say: "Floor 3, IT Section, Row 14, Shelf 3, 'Fundamentals of OOPs programming'" to provide them with an absolute address for them to walk up the stairs and find it.

So replace "data.xml" with it's absolute address: @"C:\I keep stuff here\XML files\data.xml" and it should get rid of the error.

By the way, have a look at this: Where should I store my data?[^] - it may be a little advanced for you, but it suggests some sensible places to keep data, and shows you how to get the path to them.