从函数添加项目到列表视图

Question

我正在尝试在我的 listView1 中添加一行。我如何在另一个函数中执行此操作？

我正在阅读 this post。他们希望我直接将其添加到按钮功能中。我不想那样做。

private void button1_Click(object sender, EventArgs e)
{
    keyword();
}

public static void keyword()
{
    string country = "";
    string key = "1070";

    //Goto GetHtmlAsync
    GetHtmlAsync(key, country);
}

public static async void GetHtmlAsync(string key, string country)
{
    //GetHtmlAsync
    var url = "https://www.test.com/search?county=" + country + "&q=" + key;

    var httpClient = new HttpClient();
    var html = await httpClient.GetStringAsync(url);

    var htmlDocument = new HtmlDocument();
    htmlDocument.LoadHtml(html);

    //This is grabbed from HtmlDocument (list)
    var id = "58756";
    var seller = "Test";
    var product = "GTX 1070";
    var betTime = "10:10";
    var price = "100";
    var shipping = "4";

    string[] row = { id, seller, product, betTime, price + shipping, url };
    var listViewItem = new ListViewItem(row);
    listView1.Items.Add(listViewItem);
}

我希望它在此处的 listView1 中添加一行 listView1.Items.Add(listViewItem);，但我收到一条错误消息

An object reference is required for the non-static field, method, or property 'Form1.listView1'

Answer 1

所以根据你的要求试试这个。

private void button1_Click(object sender, EventArgs e)
{
    keyword();
}
// Non static so that you can access ListView1
public void keyword()
{
    string country = "";
    string key = "1070";

    //Goto GetHtmlAsync
    GetHtmlAsync(key, country);
}
// Non static
public async void GetHtmlAsync(string key, string country)
{
    //GetHtmlAsync
    var url = "https://www.test.com/search?county=" + country + "&q=" + key;

    var httpClient = new HttpClient();
    var html = await httpClient.GetStringAsync(url);

    var htmlDocument = new HtmlDocument();
    htmlDocument.LoadHtml(html);

    //This is grabbed from HtmlDocument (list)
    var id = "58756";
    var seller = "Test";
    var product = "GTX 1070";
    var betTime = "10:10";
    var price = "100";
    var shipping = "4";

    string[] row = { id, seller, product, betTime, price + shipping, url };
    var listViewItem = new ListViewItem(row);
    listView1.Items.Add(listViewItem);
}

从函数添加项目到列表视图

Add item to Listview from function

c#

listview

listviewitem