Added Background fixed some code deleted useless stuff

CurrencyConvert.csproj.user

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-        <Compile Update="Form1.cs">
+    <Compile Update="MoneyConverter.cs">
       <SubType>Form</SubType>
     </Compile>
   </ItemGroup>

Form1.cs

@@ -1,133 +0,0 @@
-using Newtonsoft.Json;
-using System.Collections.Generic;
-
-namespace CurrencyConvert
-{
-    public partial class Form1 : Form
-    {
-        
-        private readonly HashSet<string> supportedCurrencies = new HashSet<string>
-        {
-            "AUD", "BGN", "BRL", "CAD", "CHF", "CNY", "CZK", "DKK", 
-            "EUR", "GBP", "HKD", "HUF", "IDR", "ILS", "INR", "ISK", 
-            "JPY", "KRW", "MXN", "MYR", "NOK", "NZD", "PHP", "PLN", 
-            "RON", "SEK", "SGD", "THB", "TRY", "USD", "ZAR"
-        };
-
-        public Form1()
-        {
-            InitializeComponent();
-
-            
-            comboBox1.Items.Clear();
-            comboBox2.Items.Clear();
-            foreach (string currency in supportedCurrencies)
-            {
-                comboBox1.Items.Add(currency);
-                comboBox2.Items.Add(currency);
-            }
-
-            comboBox1.SelectedIndex = comboBox1.Items.IndexOf("EUR");
-            comboBox2.SelectedIndex = comboBox2.Items.IndexOf("USD");
-            
-            
-            label4.AutoSize = true;
-            label4.Font = new Font(label4.Font.FontFamily, 12, FontStyle.Bold);
-        }
-
-        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
-        {
-
-        }
-
-        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
-        {
-            if (!char.IsDigit(e.KeyChar) && e.KeyChar != ',' && e.KeyChar != '.' && e.KeyChar != (char)Keys.Back)
-            {
-                e.Handled = true;
-            }
-        }
-
-        private async void button1_Click(object sender, EventArgs e)
-        {
-            try
-            {
-                
-                label4.Text = "Berechne...";
-                button1.Enabled = false;
-
-                if (string.IsNullOrWhiteSpace(textBox1.Text))
-                {
-                    MessageBox.Show("Bitte geben Sie einen Betrag ein.");
-                    return;
-                }
-
-                
-                string amount = textBox1.Text.Replace(',', '.');
-                if (!double.TryParse(amount, System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out double menge))
-                {
-                    MessageBox.Show("Bitte geben Sie einen gültigen Betrag ein.");
-                    return;
-                }
-
-                if (comboBox1.SelectedItem == null || comboBox2.SelectedItem == null)
-                {
-                    MessageBox.Show("Bitte wählen Sie beide Währungen aus.");
-                    return;
-                }
-
-                string von = comboBox1.SelectedItem.ToString().Trim().ToUpper();
-                string zu = comboBox2.SelectedItem.ToString().Trim().ToUpper();
-
-                if (!supportedCurrencies.Contains(von) || !supportedCurrencies.Contains(zu))
-                {
-                    MessageBox.Show($"Eine oder beide Währungen werden nicht unterstützt.\nUnterstützte Währungen: {string.Join(", ", supportedCurrencies)}");
-                    return;
-                }
-                
-                
-                string url = $"https://api.frankfurter.app/latest?amount={amount}&from={von}&to={zu}";
-                
-                using (HttpClient client = new HttpClient())
-                {
-                    var response = await client.GetAsync(url);
-                    string json = await response.Content.ReadAsStringAsync();
-
-                    if (!response.IsSuccessStatusCode)
-                    {
-                        MessageBox.Show("Fehler beim Abrufen der Wechselkurse.");
-                        return;
-                    }
-
-                    var data = JsonConvert.DeserializeObject<FrankfurterResponse>(json);
-
-                    if (data?.rates == null || !data.rates.ContainsKey(zu))
-                    {
-                        MessageBox.Show("Fehler beim Abrufen der Wechselkurse.");
-                        return;
-                    }
-
-                    double ergebnis = data.rates[zu];
-                    label4.Text = $"{menge} {von} = {ergebnis:0.00} {zu}";
-                }
-            }
-            catch (Exception)
-            {
-                MessageBox.Show("Ein Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.");
-            }
-            finally
-            {
-                button1.Enabled = true;
-            }
-        }
-    }
-
-    public class FrankfurterResponse
-    {
-        public double amount { get; set; }
-        public string base_currency { get; set; }
-        public string date { get; set; }
-        public Dictionary<string, double> rates { get; set; }
-    }
-}
-

MoneyConverter.Designer.cs

@@ -1,6 +1,6 @@
 namespace CurrencyConvert
 {
-    partial class Form1
+    partial class MoneyConverter
     {
         
         private System.ComponentModel.IContainer components = null;
@@ -56,6 +56,7 @@
             // label1
             // 
             label1.AutoSize = true;
+            label1.BackColor = Color.Transparent;
             label1.Location = new Point(184, 34);
             label1.Name = "label1";
             label1.Size = new Size(97, 20);
@@ -65,6 +66,7 @@
             // label2
             // 
             label2.AutoSize = true;
+            label2.BackColor = Color.Transparent;
             label2.Location = new Point(184, 82);
             label2.Name = "label2";
             label2.Size = new Size(89, 20);
@@ -82,11 +84,13 @@
             // label3
             // 
             label3.AutoSize = true;
+            label3.BackColor = Color.Transparent;
             label3.Location = new Point(184, 132);
             label3.Name = "label3";
             label3.Size = new Size(144, 20);
             label3.TabIndex = 5;
             label3.Text = "Menge der Währung";
+            label3.Click += label3_Click;
             // 
             // button1
             // 
@@ -104,17 +108,20 @@
             // label4
             // 
             label4.AutoSize = true;
+            label4.BackColor = Color.Transparent;
             label4.Location = new Point(28, 263);
             label4.Name = "label4";
             label4.Size = new Size(66, 20);
             label4.TabIndex = 7;
             label4.Text = "Ergebnis";
             // 
-            // Form1
+            // MoneyConverter
             // 
             AutoScaleDimensions = new SizeF(8F, 20F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(709, 496);
+            BackColor = SystemColors.HighlightText;
+            BackgroundImage = Properties.Resources.Background;
+            ClientSize = new Size(366, 328);
             Controls.Add(label4);
             Controls.Add(button1);
             Controls.Add(label3);
@@ -123,8 +130,9 @@
             Controls.Add(label1);
             Controls.Add(comboBox2);
             Controls.Add(comboBox1);
-            Name = "Form1";
+            Name = "MoneyConverter";
-            Text = "Form1";
+            Text = "MoneyConverter";
+            Load += Form1_Load;
             ResumeLayout(false);
             PerformLayout();
         }

MoneyConverter.cs

@@ -0,0 +1,152 @@
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace CurrencyConvert
+{
+    public partial class MoneyConverter : Form
+    {
+
+        private readonly string[] supportedCurrencies = new string[]
+        {
+            "AUD", "BGN", "BRL", "CAD", "CHF", "CNY", "CZK", "DKK",
+            "EUR", "GBP", "HKD", "HUF", "IDR", "ILS", "INR", "ISK",
+            "JPY", "KRW", "MXN", "MYR", "NOK", "NZD", "PHP", "PLN",
+            "RON", "SEK", "SGD", "THB", "TRY", "USD", "ZAR"
+        };
+
+        public MoneyConverter()
+        {
+            InitializeComponent();
+
+
+            comboBox1.Items.Clear();
+            comboBox2.Items.Clear();
+            foreach (string currency in supportedCurrencies)
+            {
+                comboBox1.Items.Add(currency);
+                comboBox2.Items.Add(currency);
+            }
+
+            comboBox1.SelectedIndex = comboBox1.Items.IndexOf("EUR");
+            comboBox2.SelectedIndex = comboBox2.Items.IndexOf("USD");
+
+
+            label4.AutoSize = true;
+            label4.Font = new Font(label4.Font.FontFamily, 12, FontStyle.Bold);
+        }
+
+        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
+        {
+            if (!char.IsDigit(e.KeyChar) && e.KeyChar != ',' && e.KeyChar != '.' && e.KeyChar != (char)Keys.Back)
+            {
+                e.Handled = true;
+            }
+        }
+
+        private async void button1_Click(object sender, EventArgs e)
+        {
+            
+            label4.Text = "Berechne...";
+            button1.Enabled = false;
+
+            
+            if (string.IsNullOrWhiteSpace(textBox1.Text))
+            {
+                MessageBox.Show("Bitte geben Sie einen Betrag ein.");
+                button1.Enabled = true;
+                return;
+            }
+
+            
+            string amountText = textBox1.Text.Replace(',', '.');
+            double amount;
+            bool isNumber = double.TryParse(amountText, System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out amount);
+            if (!isNumber)
+            {
+                MessageBox.Show("Bitte geben Sie einen gültigen Betrag ein.");
+                button1.Enabled = true;
+                return;
+            }
+
+            
+            if (comboBox1.SelectedItem == null || comboBox2.SelectedItem == null)
+            {
+                MessageBox.Show("Bitte wählen Sie beide Währungen aus.");
+                button1.Enabled = true;
+                return;
+            }
+
+            
+            string fromCurrency = comboBox1.SelectedItem.ToString().Trim().ToUpper();
+            string toCurrency = comboBox2.SelectedItem.ToString().Trim().ToUpper();
+
+            
+            bool fromSupported = false;
+            bool toSupported = false;
+            foreach (string currency in supportedCurrencies)
+            {
+                if (currency == fromCurrency) fromSupported = true;
+                if (currency == toCurrency) toSupported = true;
+            }
+            if (!fromSupported || !toSupported)
+            {
+                MessageBox.Show("Eine oder beide Währungen werden nicht unterstützt.");
+                button1.Enabled = true;
+                return;
+            }
+
+            
+            string url = "https://api.frankfurter.app/latest?amount=" + amountText + "&from=" + fromCurrency + "&to=" + toCurrency;
+
+            
+            HttpClient client = new HttpClient();
+            HttpResponseMessage response = await client.GetAsync(url);
+            string json = await response.Content.ReadAsStringAsync();
+
+            if (!response.IsSuccessStatusCode)
+            {
+                MessageBox.Show("Fehler beim Abrufen der Wechselkurse.");
+                button1.Enabled = true;
+                return;
+            }
+
+            FrankfurterResponse data = JsonConvert.DeserializeObject<FrankfurterResponse>(json);
+
+            if (data == null || data.rates == null || !data.rates.ContainsKey(toCurrency))
+            {
+                MessageBox.Show("Fehler beim Abrufen der Wechselkurse.");
+                button1.Enabled = true;
+                return;
+            }
+
+            double result = data.rates[toCurrency];
+            label4.Text = amount + " " + fromCurrency + " = " + result.ToString("0.00") + " " + toCurrency;
+
+            button1.Enabled = true;
+        }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+
+        }
+
+        private void label3_Click(object sender, EventArgs e)
+        {
+
+        }
+    }
+
+    public class FrankfurterResponse
+    {
+        public double amount { get; set; }
+        public string base_currency { get; set; }
+        public string date { get; set; }
+        public Dictionary<string, double> rates { get; set; }
+    }
+}
+

Program.cs

@@ -11,7 +11,7 @@ namespace CurrencyConvert
             // To customize application configuration such as set high DPI settings or default font,
             // see https://aka.ms/applicationconfiguration.
             ApplicationConfiguration.Initialize();
-            Application.Run(new Form1());
+            Application.Run(new MoneyConverter());
         }
     }
 }

Properties/Resources.Designer.cs

@@ -60,6 +60,16 @@ namespace CurrencyConvert.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap Background {
+            get {
+                object obj = ResourceManager.GetObject("Background", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>

Properties/Resources.resx

@@ -118,10 +118,13 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
-  <data name="Euro" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Resources\Euro.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
-  </data>
   <data name="Euro1" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\Euro1.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="Euro" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Euro.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="Background" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Background.jpg;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>

obj/Debug/net8.0-windows/CurrencyConvert.AssemblyInfo.cs

@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("CurrencyConvert")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+49813f523c3f34dcd8f71e2715720478dba4336d")]
 [assembly: System.Reflection.AssemblyProductAttribute("CurrencyConvert")]
 [assembly: System.Reflection.AssemblyTitleAttribute("CurrencyConvert")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

obj/Debug/net8.0-windows/CurrencyConvert.AssemblyInfoInputs.cache

@@ -1 +1 @@
-861cff0492995bfdf65c6a8287334b22d4a50ab65208d23816ade7ac77479a9c
+5a969a5d6ad40d34e0088ed564d4ce93fdbd68bcc1aee708c09cc350f732b47d

obj/Debug/net8.0-windows/CurrencyConvert.csproj.CoreCompileInputs.cache

@@ -1 +1 @@
-4b3f8ed66ef892d49dcd4ec591dd76964fb33b7849e8269c41fd33a533999b3b
+d94f5a7fb60fe6f3c14e30e5724ba7ab2500f212694980dd3ec08fc32bf234f4

obj/Debug/net8.0-windows/CurrencyConvert.csproj.FileListAbsolute.txt

@@ -3,7 +3,6 @@ C:\Users\bib\source\repos\CurrencyConvert\bin\Debug\net8.0-windows\CurrencyConve
 C:\Users\bib\source\repos\CurrencyConvert\bin\Debug\net8.0-windows\CurrencyConvert.runtimeconfig.json
 C:\Users\bib\source\repos\CurrencyConvert\bin\Debug\net8.0-windows\CurrencyConvert.dll
 C:\Users\bib\source\repos\CurrencyConvert\bin\Debug\net8.0-windows\CurrencyConvert.pdb
-C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConvert.Form1.resources
 C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConvert.csproj.GenerateResource.cache
 C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConvert.GeneratedMSBuildEditorConfig.editorconfig
 C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConvert.AssemblyInfoInputs.cache
@@ -18,3 +17,4 @@ C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConve
 C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConvert.csproj.AssemblyReference.cache
 C:\Users\bib\source\repos\CurrencyConvert\bin\Debug\net8.0-windows\Newtonsoft.Json.dll
 C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\Currency.DEA7AA0F.Up2Date
+C:\Users\bib\source\repos\CurrencyConvert\obj\Debug\net8.0-windows\CurrencyConvert.MoneyConverter.resources