小编Max*_*ner的帖子

嗨，我在浏览器中运行代码时收到此错误：

TypeError: Object(...) 不是函数 ./src/index.js src/index.js:31

28 | firebaseStateName: 'firebase' 29 | 30 | const initialState = {};

31 | const store = createStore(rootReducer,initialState, 32 | compose( 33 | applyMiddleware(thunk.withExtraArgument({ getFirebase, getFirestore })), 34 | reactReduxFirebase(firebase, config),

我尝试使用事物库：

http://docs.react-redux-firebase.com/history/v3.0.0/docs/integrations/thunks.html

然而仍然没有成功：/

在我的 index.js 文件下面

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';
import { createStore, applyMiddleware, compose } from 'redux'
import rootReducer from './store/reducers/rootReducer'
import { Provider } from …

如果记录存在,我想在我的C#应用​​程序中进行额外的控制.

我有以下代码 - 但它仍然返回-1的结果,即使该记录确实存在于SQL Server数据库中.

有人可以帮我弄这个吗？我添加了 - >出错的地方

private void btnVerwijderen_Click(object sender, RoutedEventArgs e)
{
    if (autonrTextBox.Text == "")
    {
        MessageBox.Show("Waarschuwing u kunt geen auto verwijderen indien er GEEN autonr is ingevuld");
    }
    else
    {
    --> SqlConnection con = new SqlConnection(@"Data Source=DESKTOP-RSEBNR7;Initial Catalog=AudiDealer;Integrated Security=True");
    --> string check = "SELECT autonr FROM auto WHERE autonr =@autonr";

    --> SqlCommand command1 = new SqlCommand(check, con);
    --> command1.Parameters.AddWithValue("@autonr", autonrTextBox.Text);

        con.Open();
        int auto = command1.ExecuteNonQuery();
        con.Close();

--> X - 1   MessageBox.Show(auto.ToString());

        if (auto > 0) …