Get Response object from asp.net Button Onclick Event

I have an ASP.NET Webform, Which includes a server side Button. I have registered an Onclick button event on it.

<asp:Button ID="UploadButton" CssClass="btn add btn-primary" runat="server" Text="Upload File" OnClick="UploadButton_Click" />

what i am trying to do is,

On the Server Side, after Processing the required things, i have filled a response object, which i want to return to client Side (like assign it to a javascript variable).

How can i get the object returned from button click event on client side.

protected ResponseModel UploadButton_Click(object sender, EventArgs e)
{
  ResponseModel responseModel = new ResponseModel(); 
  //Processing File
  //filling Response Object
  return responseModel 
}

Initially return type of the UploadButton_Click() method was void.

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Answers:

Method 1

Answers:

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Method 1

I’m not sure how complex or simple is your response object but have you tried using a <asp:HiddenField />? Something like:

<asp:HiddenField ID="hiddenField" runat="server" value="" />

Then in your code-behind:

protected void UploadButton_Click(object sender, EventArgs e)
{
  //Processing File
  //filling Response Object
  hiddenField.Value = responseObject.customProperty;
}

Javascript should be able to find it via:

document.getElementById('<%=hiddenField.ClientID%>')

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