Add QueryWindow

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;
+        }
+    }
+}