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How Can I Inject JavaScript into a WebBrowser Control When `innerHTML` is Unsupported?

Barbara Streisand
Barbara StreisandOriginal
2025-01-26 21:11:38458browse

How Can I Inject JavaScript into a WebBrowser Control When `innerHTML` is Unsupported?

Workaround for Injecting JavaScript into WebBrowser Control

Directly injecting JavaScript using innerHTML isn't feasible with the System.Windows.Forms.HtmlElement object. This guide provides a solution to execute scripts successfully within the WebBrowser control.

Here's how to inject JavaScript code:

  1. Access the page's <head> element via the Document object.
  2. Create a new HtmlElement representing a <script> tag.
  3. Cast the HtmlDomElement to IHTMLScriptElement to access the text property.
  4. Assign your JavaScript code to the text property.
  5. Append the <script> tag to the <head> element.
  6. Use the Document object's InvokeScript method to execute the JavaScript function.

This revised approach bypasses the limitations of innerHTML and ensures successful JavaScript execution within the WebBrowser control.

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