110 lines
4.0 KiB
C#
110 lines
4.0 KiB
C#
using Elwig.Helpers;
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using Elwig.Helpers.Export;
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using Microsoft.Win32;
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using System;
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using System.Collections.Generic;
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using System.Data.Common;
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using System.Linq;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Input;
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namespace Elwig.Windows {
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public partial class QueryWindow : Window {
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private ICommand? _enterCommand;
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public ICommand EnterCommand => _enterCommand ??= new ActionCommand(async () => {
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await DisplayQuery();
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});
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private ICommand? _saveCommand;
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public ICommand SaveCommand => _saveCommand ??= new ActionCommand(async () => {
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await SaveQuery();
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});
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public QueryWindow() {
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InitializeComponent();
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}
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private async void QueryButton_Click(object sender, RoutedEventArgs evt) {
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await DisplayQuery();
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}
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private async void SaveButton_Click(object sender, RoutedEventArgs evt) {
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await SaveQuery();
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}
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private async Task DisplayQuery() {
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try {
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Mouse.OverrideCursor = Cursors.Wait;
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await DisplayQuery(QueryInput.Text);
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Mouse.OverrideCursor = null;
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} catch (Exception e) {
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Mouse.OverrideCursor = null;
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MessageBox.Show(e.Message, "Fehler beim Ausführen", MessageBoxButton.OK, MessageBoxImage.Error);
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}
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}
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private async Task SaveQuery() {
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await SaveQuery(QueryInput.Text);
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}
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private static async Task<(IList<DbColumn>, IEnumerable<object[]>)> ExecuteQuery(string sqlQuery) {
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var rows = new List<object[]>();
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using var cnx = await AppDbContext.ConnectAsync();
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using var cmd = cnx.CreateCommand();
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cmd.CommandText = sqlQuery;
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using var reader = await cmd.ExecuteReaderAsync();
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var header = await reader.GetColumnSchemaAsync();
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while (await reader.ReadAsync()) {
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var values = new object[reader.FieldCount];
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reader.GetValues(values);
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rows.Add(values);
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}
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return (header, rows);
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}
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private async Task DisplayQuery(string sqlQuery) {
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var (header, rows) = await ExecuteQuery(sqlQuery);
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var styleRight = new Style();
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styleRight.Setters.Add(new Setter(TextBlock.TextAlignmentProperty, TextAlignment.Right));
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DataList.Columns.Clear();
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for (int i = 0; i < header.Count; i++) {
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var h = header[i];
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DataList.Columns.Add(new DataGridTextColumn {
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Header = h.ColumnName.Replace("_", "__"),
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Binding = new Binding($"[{i}]"),
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CellStyle = (h.DataTypeName == "INTEGER" || h.DataTypeName == "REAL") ? styleRight : null,
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});
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}
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DataList.ItemsSource = rows;
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}
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private static async Task SaveQuery(string sqlQuery) {
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var d = new SaveFileDialog() {
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FileName = $"Abfrage.csv",
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DefaultExt = "csv",
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Filter = "CSV-Datei (*.csv)|*.csv",
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Title = $"Datenbank Abfrage speichern unter - Elwig"
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};
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if (d.ShowDialog() == true) {
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Mouse.OverrideCursor = Cursors.Wait;
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await Task.Run(async () => {
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try {
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var (header, rows) = await ExecuteQuery(sqlQuery);
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using var csv = new CsvSimple(d.FileName, ';', Utils.UTF8BOM);
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await csv.ExportAsync(rows.Prepend([.. header.Select(h => h.ColumnName)]));
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} catch (Exception exc) {
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MessageBox.Show(exc.Message, "Fehler beim Ausführen", MessageBoxButton.OK, MessageBoxImage.Error);
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}
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});
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Mouse.OverrideCursor = null;
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}
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}
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}
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}
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