object reference not set to an instance of an object

Object Reference not mix to lớn an instance of an object

  • 1.  Object Reference not mix to lớn an instance of an object

    The code stage has no errors compiled, while running it fires this error ==>Object Reference not mix to lớn an instance of an object

    Why is not saying which is the error??

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    Cohen
    RPA Developer

    Romania
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  • 2.  RE: Object Reference not mix to lớn an instance of an object

    Object Reference related errors are run rẩy time errors not compiler errors. These errors normally come when you try to lớn refer to lớn a data item/variable which is null (Null Reference exception)  or else if you are trying to lớn refer to lớn a variable which is not yet initialized.  .

    Can you please post your code ví that we can guide you further?

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    Vivek Goel
    RPA Architect
    Asia/Singapore
    +6594554364
    https://www.rpatools.com/
    "If you lượt thích this post, please press the "Recommend" Button.
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  • 3.  RE: Object Reference not mix to lớn an instance of an object

    Hi Vivek,

    Xem thêm: small black bug with hard shell

    Could you guide bầm through my code related to lớn the same issue:

    Page page = System.Web.HttpContext.Current.Handler as Page;
    str = "page doesn't exist";
    if (page != null)
    { str = "page exists!!";
    }
    There is the same runtime exception - object reference not mix. I have the dll and reference mentioned in the Init page though.

    Along with the above if you could additionally help bầm with the below:
    I am trying to lớn run rẩy this code through code stage in BP to lớn Hotline a java script function "JSFUNCTION" - the JS function already exists in the webpage.
    System.Web.UI.Page page = new System.Web.UI.Page();
    ClientScriptManager cs = page.ClientScript;
    cs.RegisterStartupScript(page.GetType(), "Javascript", "JSFUNCTION(false,this);", true);

    The run rẩy is successful but nothing happens on the page, the function works when called from Console (dev tool in browser).

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    Rohan Shankar
    Analyst
    Ericsson
    Asia/Kolkata
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  • 4.  RE: Object Reference not mix to lớn an instance of an object

    Best Answer

    An Object is an instance of a Class , it is stored some where in memory. A reference is what is used to lớn describe the pointer to lớn the memory location where the Object resides. The message "object reference not set to an instance of an object" means that you are referring to lớn an object the does not exist or was deleted or cleaned up. It's usually better to lớn avoid a NullReferenceException than vãn to lớn handle it after it occurs. To prevent the error, objects that could be null should be tested for null before being used.

    if (mClass != null)
    {
    // Go ahead and use mClass
    mClass.property = ...
    }
    else
    {
    // Attempting to lớn use mClass here will result in NullReferenceException
    }

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    evan chirger
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  • Xem thêm: tâm trạng mị trong đêm tình mùa xuân

    5.  RE: Object Reference not mix to lớn an instance of an object

    Hi,
    I had similar issue. And problem appeared because bot user used to lớn login to lớn Windows, had temp windows profile.
    Once I used other user at this VDI with normal profile, and also return bot user to lớn use normal profile, issue disappeared. 
    Best Regards
    Piotr Wieczerzak

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    Piotr Wieczerzak
    Senior developer and analyst
    Brown Brothers Harriman
    Europe/Warsaw
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