无法在WebBrowser中以编程方式将值设置为textBox控件 [英] Unable to set value to textBox control programatically in WebBrowser

问题描述

我尝试在Web浏览器中以编程方式将值设置为文本框，但它引发了Null异常。

这是代码，我试过了： -

webBrowser1.Document.GetElementById（field-summary）。InnerText =Something;

webBrowser1.Document.GetElementById（field-summary）.setAttribute（value，Something）;

我试图通过使用Quick手表和它在那里，但我无法设置一个值。

在此，我也附加了手表的捕捉。

这是错误，我得到了。

发生了类型为'System.Reflection.TargetInvocationException'的第一次机会异常在mscorlib.dll中

我的问题是我正在尝试为内联文本设置一个值，并且我没有对InnerText进行任何操作。但仍然是抛出错误。

我已经尝试了InnerText，值也是。但仍然无法使用。

我也附上了snap，使用Inspect作为参考。

PS：
1.所有这些代码集都在WebBrowser的DocumentCompleted Event中完成，但仍然无法完成。
2.我访问了其他页面中的其他元素（文本），并使用InnerText访问并设置了它的值。但无法处理这个元素。

有人可以说明它为什么这样做，所以我可以理解它。

谢谢。

解决方案

>

如何获取HTML文本框的值？ / b>

因此，以下代码适用于我。

动态elePrice = webBrowser.Document.GetElementById （ 价格）一个DOMElement。
string sValue = elePrice.value;

谢谢。

I am trying to set a value programatically to a textbox in a web browser but it is throwing the Null exception.

This is the code, I have tried:-

webBrowser1.Document.GetElementById("field-summary").InnerText = "Something";

webBrowser1.Document.GetElementById("field-summary").SetAttribute("value", "Something");

I have tried to find the element by using the Quick Watch and it is there, but I am unable to set a value.

Hereby, I have attached the snap of watch too.

And this is the error, I am getting.

A first chance exception of type 'System.NullReferenceException' occurred in TimeSheet.exe A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll

My question is I am trying to set a value to the innertext and I am not doing any manipulation with the InnerText. But still it is throwing error.

I have tried both InnerText, value too. But still unable.

I have also attached the snap, using the Inspect for reference.

PS: 1. All these code set are done in the DocumentCompleted Event of the WebBrowser, but still unable.. 2. I have accessed other elements (text) in some other pages and used the InnerText for accessing and setting a value for it. But unable to do with this element.

Could some one throw a light on why it is doing so, so I can able to understand it.

Thanks.

解决方案

Found a working solution for my problem from SO,.

How to get HTML textbox value?

So, the following code worked for me.

dynamic elePrice = webBrowser.Document.GetElementById("price").DomElement; string sValue = elePrice.value;

Thanks.

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