如何使用c#设置网站中输入文本的值? [英] How do I can set value of an input text in a website using c# ?

问题描述

您好，我想访问该网站:www.wine-searcher.com/wine-valuation-f.lml，我想更改第一个文本框的值，并使用"cotation"下面的按钮提交. br/> 如何使用C#以编程方式做到这一点?

我尝试了这个，但得到了空引用异常

这是我的代码:

webBrowser1.Navigate("http://www.wine-searcher.com/wine-valuation-f.lml");
webBrowser1.Document.GetElementById("wn1_input").InnerText ="TextToPut";


预先感谢您的回答.

Hi I want to access to this website : www.wine-searcher.com/wine-valuation-f.lml , and I want to change value of the first textbox and to submit with the button below "cotation" .
how can I do that programmatically with c# ?

I tried this but I get Null Reference Exception

this is my code :

webBrowser1.Navigate("http://www.wine-searcher.com/wine-valuation-f.lml");
webBrowser1.Document.GetElementById("wn1_input").InnerText ="TextToPut";


Thank you in advance for your answer.

推荐答案

您的代码很正确，但是您必须处理DocumentCompleted事件.

参见例如

Your code is just right, but you must handle the DocumentCompleted Event.

see, for example

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            webBrowser1.Navigate("http://www.wine-searcher.com/wine-valuation-f.lml");

        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            webBrowser1.Document.GetElementById("wn1_input").InnerText = "TextToPut";
        }
    }

希望对您有所帮助:)

hope it helps :)

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