private void columns_add_column_button_Click(object sender, EventArgs e) { var tableName = dash_tables_listBox.SelectedItem?.ToString(); var columns = columns_add_columnNames_listBox.Items; var valueTypes = columns_add_valueTypes_listBox.Items; if (string.IsNullOrWhiteSpace(tableName) || columns.Count == 0 || valueTypes.Count == 0 || columns.Count != valueTypes.Count) { HandleError("Table name, columns, and value types must not be empty. Column and values count must match."); return; } var newTableDto = new AddNewTableDto() { TableName = $"{dash_statusStrip_schema_value.Text}.{tableName}", Columns = new List <ColumnDto>() }; for (var i = 0; i < columns.Count; i++) { newTableDto.Columns.Add(new ColumnDto { ColumnName = columns[i].ToString(), Value = valueTypes[i].ToString() }); } try { _sql.AddColumnToTable(newTableDto, connDto); WriteToLog("Successfully added columns to table:"); WriteToLog(tableName); resetTableList(); columns_add_columnNames_listBox.Items.Clear(); columns_add_valueTypes_listBox.Items.Clear(); } catch (Exception ex) { HandleError("Error adding columns to table:", ex); return; } }