Tweak vindu og MySQL connection string i app.config

DatabaseConnection/DatabaseConnection/App.config

@@ -3,4 +3,7 @@
     <startup> 
         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
     </startup>
+    <appSettings>
+      <add key="mysqlConnectionString" value="server=localhost;port=3306;user id=student_readonly;database=student2018" />
+    </appSettings>
 </configuration>

DatabaseConnection/DatabaseConnection/DatabaseConnection.csproj

@@ -49,6 +49,7 @@
       <HintPath>..\..\..\..\..\..\..\Program Files (x86)\MySQL\Connector NET 8.0\Assemblies\v4.5.2\MySql.Web.dll</HintPath>
     </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Configuration" />
     <Reference Include="System.Core" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />

DatabaseConnection/DatabaseConnection/DatabaseConnectionForm.Designer.cs

@@ -37,19 +37,17 @@
             // tableData
             // 
             this.tableData.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
-            this.tableData.Location = new System.Drawing.Point(16, 15);
+            this.tableData.Location = new System.Drawing.Point(12, 12);
-            this.tableData.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
             this.tableData.Name = "tableData";
-            this.tableData.Size = new System.Drawing.Size(1124, 473);
+            this.tableData.Size = new System.Drawing.Size(843, 384);
             this.tableData.TabIndex = 0;
             // 
             // updateBtn
             // 
             this.updateBtn.Cursor = System.Windows.Forms.Cursors.Hand;
-            this.updateBtn.Location = new System.Drawing.Point(523, 511);
+            this.updateBtn.Location = new System.Drawing.Point(392, 415);
-            this.updateBtn.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
             this.updateBtn.Name = "updateBtn";
-            this.updateBtn.Size = new System.Drawing.Size(175, 28);
+            this.updateBtn.Size = new System.Drawing.Size(131, 23);
             this.updateBtn.TabIndex = 1;
             this.updateBtn.Text = "Oppdater tabell";
             this.updateBtn.UseVisualStyleBackColor = true;
@@ -57,14 +55,15 @@
             // 
             // DatabaseConnectionForm
             // 
-            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(1156, 554);
+            this.ClientSize = new System.Drawing.Size(867, 450);
             this.Controls.Add(this.updateBtn);
             this.Controls.Add(this.tableData);
             this.Cursor = System.Windows.Forms.Cursors.Default;
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
             this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
-            this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.MaximizeBox = false;
             this.Name = "DatabaseConnectionForm";
             this.Text = "Database Connection";
             this.Load += new System.EventHandler(this.DatabaseConnectionForm_Load);

DatabaseConnection/DatabaseConnection/MySqlConnectionHandler.cs

@@ -1,5 +1,6 @@
 using System.Data;
 using MySql.Data.MySqlClient;
+using System.Configuration;
 
 namespace DatabaseConnection
 {
@@ -17,10 +18,19 @@ namespace DatabaseConnection
             // Sjekk at connection er definert.
             if (_connection == null)
             {
-                _connection = new MySqlConnection("server=localhost;user id=student_readonly;database=student2018");
+                // Se i filen `App.config` om connection string stemmer.
+                // Dette ble egentlig bare brukt fordi jeg utviklet på to forskjellige maskiner med forskjellige
+                // MySQL servere og konfigurasjoner. "Default" bør være lignende:
+                //
+                // "server=localhost;port=3306;user id=root;password=passord;database=student2018"
+                // 
+                // Alternativt så kan du bare endre denne stringen :)
+                var connectionString = ConfigurationManager.AppSettings["mysqlConnectionString"];
+                _connection = new MySqlConnection(connectionString);
             }
 
-            // Pass på at connection er tilkoblet.
+            // Pass på at connection er tilkoblet, men ikke prøv å åpne en ny en
+            // hvis det allerede eksisterer en åpen connection.
             var state = _connection.State;
             if (state == ConnectionState.Closed)
             {
@@ -39,14 +49,15 @@ namespace DatabaseConnection
             _connection.Close();
         }
 
-        public DataTable GetTableValues()
+        public DataTable GetTableValues(bool withExtraValues = false)
         {
             // Lag et variabel som holder et midlertidig "DataTable"
             var table = new DataTable();
 
             // MySqlDataAdapter lar oss sende SQL-kode til serveren og hente ut
             // dataen vi vil ha fra databasen.
-            var data = new MySqlDataAdapter($"select * from student", _connection);
+            var sqlString = "SELECT * FROM student";
+            var data = new MySqlDataAdapter(sqlString, _connection);
 
             // Fyller opp det midlertidige "DataTable"-variabelet med data
             // fra MySQL-databasen som vi akkurat hentet ut.