webBrowser如何为网页中的高级编辑框设置value

Question

webBrowser如何为下图中的高级编辑框设置value：

部分HTML如下：

</td>
    </tr>  
  <tr>
    <td colspan="2" align="center" valign="top" class="bk">
    <script type="text/javascript" src="./ckeditor/ckeditor.js"></script>  
    <textarea cols="80" name="gently_editor" id="gently_editor" rows="10"></textarea> 
    <script type="text/javascript"> 
    CKEDITOR.replace('gently_editor');     //content为textarea的id
if(content=="[object]") content="";
 document.getElementById("gently_editor").value=content;
  </script>
<!--<textarea name="gently_editor" id="gently_editor" style="display:none" ></textarea>
<iframe id="frm"  frameborder="0" marginheight="0" marginwidth="0" scrolling="No" width="690" height="460" src="Editor/Edit/editor.htm"></iframe>-->
    </td>
  </tr>
  <tr>
    <td colspan="2" align="left" valign="top" class="bk">
</td>

Answer 1

你这是WinForm还是Web的问题，说清楚我可以帮助你移动到对应的板块以便获取更多的帮助。

同时说明一下如果不设置会怎样？

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Answer 2

那应该是一个“所见即所得”编辑器，我是想在那个文本输入框textarea中使用webBrowser输入文本。

如果不输入，网页就会弹出错误提示框

Answer 3

在IE等浏览器中打开有问题吗？

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Answer 4

没有问题，我是在做一个程序，想利用webBrowser在那个文本输入框中使用输入文本。但SetAttribute无效，所以才来请教大牛想用其他方法实现

Answer 5

或许你应该考虑innerText而不是value，因为value是属性，而textarea没有这个属性。

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Answer 6

我想你应该是想通过WebBrowser这个控件来对页面进行操作的。整个HTML文档以及其包含的各个HTML元素，都和一个个HtmlDocument、HtmlElement之类的.Net对象对应。因此只要找到这个“文本输入框”对应的HtmlElement对象。

相信下面的文章可以帮助到你，你可以按照文章的步骤来实现你的需求：

http://smalldust.cnblogs.com/archive/2006/03/08/345561.html

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Answer 7

innerText也为不可设置的属性，请看下图：

那又该怎么办呢？

Answer 8

WebBrowser只是html的一个容器了，你可以使用HtmlDocument这个类来对WebBrowser控件内的html进行操作的，你首先要获得你操作的html元素，然后对其设置，你的innerText不能设置，你可以设置它的innerHtml来实现的了：具体代码如下：

// 获得TextArea标签，类似js的写法了
HtmlElement textarea = webBrowser.Document.GetElementById("gently_editor") 
// 设置textarea内的内容,字符串你可以根据的需要设置，也可以设置为html字符串，如"<p>Hello World</p>"
textarea.InnerHtml="hello";

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Answer 9

失败了，还是不行。求改进

Answer 10

具体失败的原因是什么了?最好有截图的

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Answer 11

就是没有反应或明显效果，另外附上下图，以便帮助你分析：

Answer 12

你要操作的是嵌入在iframe里的内容吗? 主要你要先获得里面的textarea元素的，我上面的代码你调试下是否可以获取到的元素是否为空了？

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Answer 13

如果方便的话,可以上传下你的整个源码,这样可以帮助我重新这个问题并帮助更好地解决这个问题

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Answer 14

我想请问，下面的HTMLElement因素应怎么使用webBrowser找到：

Answer 15

HtmlElement body= webBrowser.Document.GetElementsByTagName ("body") 
string text =dody.InnerHtml;

可以采用这样的代码

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Answer 16

但是HTML里面包括多个以body为TagName的字段，而我想要的就是上面图中的body字段的元素，该元素属性如上面的图所示。求解决

Answer 17

GetElementsByTagName 这个方法获得是一个集合了，你可以通过foreach来遍历这个集合来找你需要的body元素的了，你可以以className来进行区别，例如：

if (webBrowser1.Document != null)
    {
        HtmlElementCollection elems = webBrowser1.Document.GetElementsByTagName("body");
        foreach (HtmlElement elem in elems)
        {
            String nameStr = elem.GetAttribute("class");
            if (nameStr != null && nameStr == "cke_show_borders")
            {
                // 此时的元素就是你要的body元素了
                string content =elem.InnerHtml;
            }
        }
    }

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Answer 18

测试后发现程序无法获取class属性。

Answer 19

可能class不是body的属性的，你可以通过其他属性来唯一确定下，你可以试试其他属性的了，你也可以通过指定索引直接获取你想要的body元素的

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Answer 20

我在设置InnerText、InnerHtml等属性为“abc”后，窗口就变了：网页中有些控件就没了，如下图所示：

求解决。

Answer 21

你是把body的内容替换了嘛？ 那这样的话肯定会导致内容页面的一些其他控件不见了啊 

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Answer 22

可是，我需要输入内容的控件的TagName就是Body，就像上图所示。那请问，有什么可以解决的方法吗？

Answer 23

你输入的内容控件是不是iframe中的body内容了？ 如果那样的话，我觉得你肯定修改了不是iframe中body内容，你可能修改了整个页面的body内容才会导致你的控件丢失了，操作iframe内的网页内容应该使用下面的方式：

HtmlDocument doc= webBrowser1.Document.Window.Frames["frameMain"].Document;//获取iframe中body元素
HtmlElement el= doc.GetElementById("drpXingbie");
el.InnerText="abc";;

更多内容参考下面的文章：

http://www.cnblogs.com/ado-geek/archive/2012/05/17/2506096.html

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Answer 24

那个元素没有name、id，我通过TagName来获取，又出现了错误。求解决

Answer 25

你先获得Iframe中文档，再通过TagName获得的元素集合来索引你想得到的元素了，你出现的错误是什么了？之前不是可以获取成功的吗？具体你可以一起描述清楚点和贴上错误图片了

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Answer 26

你好。我想实现的是向上面的所见即所得编辑器中输入内容。而输入部分的HTML如下：

图中的abcdef是人为输入提交后产生的p字段。我发现在其父级的body字段的InnerText等中可以找到相关的内容。所以我想通过修改body字段的InnerText等属性来实现p字段的建立（因为如果不提交就没有p字段，但body字段的InnerText等属性是只要文本框有内容，就会有的）。但是我失败了。所以请您帮忙解决一下。另附p字段和body字段属性：

Answer 27

// 获得Iframe中的html文档
HtmlDocument doc= webBrowser1.Document.Window.Frames[0].Document;
// 获得Iframe中的body元素
HtmlElement bodyele =doc.GetElementsByTagName("body");
// 对body元素内容赋值
bodyele.InnerHtml ="<p>abcdf</p>"; 

试试这个代码看看的

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Answer 28

谢谢您，成功了。

Answer 29

谢谢您，成功了。

补充一句：

GetElementsByTagName返回的是一个数组，获取第一个元素应该：)

HtmlElementbodyele =doc.GetElementsByTagName("body")[0];

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Answer 30

谢谢您，成功了。

恩，以后提问的时候应该汲取教训的，尽量把问题描述清楚点，最好可以有截图，这样让别人更快更好地理解你所遇到的问题，从而更好地帮助你解决问题

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Answer 31

Learning hard:)

我点击你的"my sample"貌似登陆是我的账号，并非你的……如果你要让我们看到你的Sample，建议直接黏贴Url：你看看这样如何？

Your Sample Here

方便的话加QQ（扫描我的头像），想和你做朋友，你蛮厉害的;)

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Answer 32

后来又出了问题：

当程序运行到这些代码时，就弹出了以下错误框：

但只要点击了继续，程序就会继续运行。

求解决！

Answer 33

索引异常，检查你的索引是否在预定的范围内。

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Answer 34

情况是这样的：那个网页分为几个Frames，所以加载完成DocumentCompleted事件自然就会响应三次，而我要操作的输入框是在最后一个Frame中的（索引是有的），所以就会在前两个Frame加载时出错。请问如何解决这种问题？

Answer 35

情况是这样的：那个网页分为几个Frames，所以加载完成DocumentCompleted事件自然就会响应三次，而我要操作的输入框是在最后一个Frame中的（索引是有的），所以就会在前两个Frame加载时出错。请问如何解决这种问题？

你直接写在DocumentCompleted事件中应该可以吧——全部加在完毕了。

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Answer 36

我曾经这样试过：在该DocumentCompleted事件中写上“MessageBox.show("success");”，然后人为转到该网页，结果三次弹出MessageBox，应该就可以说明DocumentCompleted事件响应了三次吧。所以我上面说出现了问题，帮忙解决一下吧！谢谢

Answer 37

我曾经这样试过：在该DocumentCompleted事件中写上“MessageBox.show("success");”，然后人为转到该网页，结果三次弹出MessageBox，应该就可以说明DocumentCompleted事件响应了三次吧。

你可以尝试定义一个全局类公共变量（比如叫flag，默认是false，表示第一次加载）。

然后在该事件中用if判断，如果是false才做你要的事情，最后在if中设置变量为true。

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Answer 38

问题解决了，谢谢。