Add QueryWindow

Elwig/Helpers/AppDbContext.cs

@@ -45,6 +45,8 @@ namespace Elwig.Helpers {
         public DateTime SavedLastWriteTime { get; private set; }
         public bool HasBackendChanged => SavedLastWriteTime != LastWriteTime;
 
+        public static string ConnectionString => $"Data Source=\"{App.Config.DatabaseFile}\"; Foreign Keys=True; Mode=ReadWrite; Cache=Default";
+
         public AppDbContext() {
             if (App.Config.DatabaseLog != null) {
                 try {
@@ -62,7 +64,7 @@ namespace Elwig.Helpers {
         }
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) {
-            optionsBuilder.UseSqlite($"Data Source=\"{App.Config.DatabaseFile}\"; Foreign Keys=True; Mode=ReadWrite; Cache=Default");
+            optionsBuilder.UseSqlite(ConnectionString);
             optionsBuilder.UseLazyLoadingProxies();
             optionsBuilder.LogTo(Log, LogLevel.Information);
             base.OnConfiguring(optionsBuilder);

Elwig/Windows/MainWindow.xaml

@@ -10,7 +10,7 @@
         <Style TargetType="Button">
             <Setter Property="FontSize" Value="14"/>
             <Setter Property="Padding" Value="9,3"/>
-            <Setter Property="Height" Value="27"/>
+            <Setter Property="Height" Value="32"/>
             <Setter Property="Width" Value="200"/>
         </Style>
     </Window.Resources>
@@ -47,8 +47,10 @@
         <Button x:Name="DeliveryListButton" Content="Lieferungungen" Click="DeliveryListButton_Click" IsEnabled="False"
                 Margin="50,280,0,0" VerticalAlignment="Top" HorizontalAlignment="Left"/>
         <Button x:Name="PdfButton" Content="PDF Erzeugen" Click="PdfButton_Click" Tag="Print"
-                Margin="50,320,0,0" VerticalAlignment="Top" HorizontalAlignment="Left"/>
+                Margin="260,160,0,0" VerticalAlignment="Top" HorizontalAlignment="Left"/>
         <Button x:Name="TestWindowButton" Content="Test Fenster" Click="TestWindowButton_Click"
-                Margin="50,360,0,0" VerticalAlignment="Top" HorizontalAlignment="Left"/>
+                Margin="260,200,0,0" VerticalAlignment="Top" HorizontalAlignment="Left"/>
+        <Button x:Name="QueryWindowButton" Content="Datenbankabfragen" Click="QueryWindowButton_Click"
+                Margin="260,240,0,0" VerticalAlignment="Top" HorizontalAlignment="Left"/>
     </Grid>
 </Window>

Elwig/Windows/MainWindow.xaml.cs

@@ -47,5 +47,10 @@ namespace Elwig.Windows {
             var w = new TestWindow();
             w.Show();
         }
+
+        private void QueryWindowButton_Click(object sender, RoutedEventArgs evt) {
+            var w = new QueryWindow();
+            w.Show();
+        }
     }
 }

Elwig/Windows/QueryWindow.xaml

@@ -0,0 +1,19 @@
+<Window x:Class="Elwig.Windows.QueryWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Datenbankabfragen - Elwig" Height="450" Width="800">
+    <Grid>
+        <TextBox x:Name="QueryInput" Text="SELECT * FROM v_delivery"
+                 AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextWrapping="Wrap"
+                 HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="10,10,120,10" Height="100"
+                 FontFamily="Cascadia Code Light" FontSize="13"/>
+        <Button x:Name="QueryButton" Content="Abfragen"
+                HorizontalAlignment="Right" VerticalAlignment="Top" Margin="10,10,10,10"
+                Click="QueryButton_Click" Height="100" Width="100"
+                FontSize="14"/>
+        <DataGrid x:Name="DataList"
+                  AutoGenerateColumns="False" HeadersVisibility="Column" IsReadOnly="True" GridLinesVisibility="None" SelectionMode="Single"
+                  CanUserDeleteRows="False" CanUserResizeRows="False" CanUserAddRows="False"
+                  HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10,120,10,10"/>
+    </Grid>
+</Window>

Elwig/Windows/QueryWindow.xaml.cs

@@ -0,0 +1,56 @@
+using Elwig.Helpers;
+using Microsoft.Data.Sqlite;
+using System;
+using System.Collections.Generic;
+using System.Data.Common;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+
+namespace Elwig.Windows {
+    public partial class QueryWindow : Window {
+        public QueryWindow() {
+            InitializeComponent();
+        }
+
+        private void QueryButton_Click(object sender, RoutedEventArgs evt) {
+            try {
+                ExecuteQuery(QueryInput.Text);
+            } catch (Exception e) {
+                MessageBox.Show(e.Message, "Fehler beim Ausführen", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+        }
+
+        private void ExecuteQuery(string sqlQuery) {
+            var rows = new List<object[]>();
+            IList<DbColumn> header;
+
+            using (var cnx = new SqliteConnection(AppDbContext.ConnectionString)) {
+                cnx.Open();
+                var cmd = cnx.CreateCommand();
+                cmd.CommandText = sqlQuery;
+                using var reader = cmd.ExecuteReader();
+                header = reader.GetColumnSchema();
+                while (reader.Read()) {
+                    var values = new object[reader.FieldCount];
+                    reader.GetValues(values);
+                    rows.Add(values);
+                }
+            }
+
+            var styleRight = new Style();
+            styleRight.Setters.Add(new Setter(TextBlock.TextAlignmentProperty, TextAlignment.Right));
+
+            DataList.Columns.Clear();
+            for (int i = 0; i < header.Count; i++) {
+                var h = header[i];
+                DataList.Columns.Add(new DataGridTextColumn {
+                    Header = h.ColumnName,
+                    Binding = new Binding($"[{i}]"),
+                    CellStyle = (h.DataTypeName == "INTEGER" || h.DataTypeName == "REAL") ? styleRight : null,
+                });
+            }
+            DataList.ItemsSource = rows;
+        }
+    }
+}