Tweak vindu og MySQL connection string i app.config
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@ -3,4 +3,7 @@
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
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</startup>
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<appSettings>
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<add key="mysqlConnectionString" value="server=localhost;port=3306;user id=student_readonly;database=student2018" />
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</appSettings>
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</configuration>
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@ -49,6 +49,7 @@
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<HintPath>..\..\..\..\..\..\..\Program Files (x86)\MySQL\Connector NET 8.0\Assemblies\v4.5.2\MySql.Web.dll</HintPath>
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</Reference>
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<Reference Include="System" />
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<Reference Include="System.Configuration" />
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<Reference Include="System.Core" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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@ -37,19 +37,17 @@
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// tableData
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//
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this.tableData.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
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this.tableData.Location = new System.Drawing.Point(16, 15);
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this.tableData.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
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this.tableData.Location = new System.Drawing.Point(12, 12);
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this.tableData.Name = "tableData";
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this.tableData.Size = new System.Drawing.Size(1124, 473);
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this.tableData.Size = new System.Drawing.Size(843, 384);
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this.tableData.TabIndex = 0;
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//
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// updateBtn
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//
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this.updateBtn.Cursor = System.Windows.Forms.Cursors.Hand;
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this.updateBtn.Location = new System.Drawing.Point(523, 511);
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this.updateBtn.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
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this.updateBtn.Location = new System.Drawing.Point(392, 415);
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this.updateBtn.Name = "updateBtn";
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this.updateBtn.Size = new System.Drawing.Size(175, 28);
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this.updateBtn.Size = new System.Drawing.Size(131, 23);
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this.updateBtn.TabIndex = 1;
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this.updateBtn.Text = "Oppdater tabell";
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this.updateBtn.UseVisualStyleBackColor = true;
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@ -57,14 +55,15 @@
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//
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// DatabaseConnectionForm
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//
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this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
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this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
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this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
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this.ClientSize = new System.Drawing.Size(1156, 554);
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this.ClientSize = new System.Drawing.Size(867, 450);
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this.Controls.Add(this.updateBtn);
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this.Controls.Add(this.tableData);
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this.Cursor = System.Windows.Forms.Cursors.Default;
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this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
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this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
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this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
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this.MaximizeBox = false;
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this.Name = "DatabaseConnectionForm";
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this.Text = "Database Connection";
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this.Load += new System.EventHandler(this.DatabaseConnectionForm_Load);
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@ -1,5 +1,6 @@
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using System.Data;
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using MySql.Data.MySqlClient;
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using System.Configuration;
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namespace DatabaseConnection
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{
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@ -17,10 +18,19 @@ namespace DatabaseConnection
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// Sjekk at connection er definert.
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if (_connection == null)
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{
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_connection = new MySqlConnection("server=localhost;user id=student_readonly;database=student2018");
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// Se i filen `App.config` om connection string stemmer.
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// Dette ble egentlig bare brukt fordi jeg utviklet på to forskjellige maskiner med forskjellige
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// MySQL servere og konfigurasjoner. "Default" bør være lignende:
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//
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// "server=localhost;port=3306;user id=root;password=passord;database=student2018"
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//
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// Alternativt så kan du bare endre denne stringen :)
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var connectionString = ConfigurationManager.AppSettings["mysqlConnectionString"];
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_connection = new MySqlConnection(connectionString);
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}
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// Pass på at connection er tilkoblet.
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// Pass på at connection er tilkoblet, men ikke prøv å åpne en ny en
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// hvis det allerede eksisterer en åpen connection.
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var state = _connection.State;
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if (state == ConnectionState.Closed)
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{
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@ -39,14 +49,15 @@ namespace DatabaseConnection
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_connection.Close();
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}
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public DataTable GetTableValues()
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public DataTable GetTableValues(bool withExtraValues = false)
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{
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// Lag et variabel som holder et midlertidig "DataTable"
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var table = new DataTable();
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// MySqlDataAdapter lar oss sende SQL-kode til serveren og hente ut
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// dataen vi vil ha fra databasen.
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var data = new MySqlDataAdapter($"select * from student", _connection);
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var sqlString = "SELECT * FROM student";
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var data = new MySqlDataAdapter(sqlString, _connection);
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// Fyller opp det midlertidige "DataTable"-variabelet med data
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// fra MySQL-databasen som vi akkurat hentet ut.
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