Error Use of unassigned local variable 'ClientScript'

Zoki Manas

Small change in your code: string strScript = null; ClientScriptManager ClientScript = Page.ClientScript; strScript = "window.open('popupContent.aspx','new_Win','height=650,width=250,resizable=0')"; ClientScript.RegisterClientScriptBlock(this.GetType(), "popup", strScript, true); View line number 2.

Manas Bhardwaj

Zoki Manas wrote:

ClientScriptManager ClientScript = Page.ClientScript;

Why to create a new object unnecesarily ? Btw, I noticed your last name is Manas. :) In Hindi, it means some one who is very close to heart. What does it mean in your language?

Manas Bhardwaj Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Md Marufuzzaman

Thanks for your help... but when i try as you suggest i get another error.. Error 1 ' does not contain a definition for 'ClientScript' and no extension method 'ClientScript' accepting a first argument of type 'GUInterface.SqlManager' could be found (are you missing a using directive or an assembly reference?) I dont know why....

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Abhishek Sur

Rather than using RegisterClientScriptBlock, it is better to use RegisterStarupScript use

if(!this.ClientScript.IsClientScriptBlockRegistered("myscript"))
this.ClientScript.RegisterStartupScript(this.GetType(), "myscript", strScript , true);

Hope this helps. :rose:

Abhishek Sur

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Abhijit Jana

Manas Bhardwaj wrote:

it means some one who is very close to heart

:rose: :jig: ;)

Abhijit Jana | Codeproject MVP Web Site : abhijitjana.net Don't forget to click "Good Answer" on the post(s) that helped you.

Md Marufuzzaman

Thanks.. Could you please tell me why RegisterStarupScript is better rather then the RegisterClientScriptBlock

I will not say I have failed 1000 times; I will say that I have discovered 1000 ways that can cause failure – Thomas Edison.

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Abhijit Jana

Make sure one things : if you have AJAX Script Manager in your page, then you have to use ScriptManager rather than ClientScript. :)

Abhijit Jana | Codeproject MVP Web Site : abhijitjana.net Don't forget to click "Good Answer" on the post(s) that helped you.

Md Marufuzzaman

Thanks for sharing...:)

I will not say I have failed 1000 times; I will say that I have discovered 1000 ways that can cause failure – Thomas Edison.

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J4amieC

Manas Bhardwaj wrote:

Why to create a new object unnecesarily ?

There's no object created there... just a reference to one which already exists on the Page class.

N a v a n e e t h

Manas Bhardwaj wrote:

Why to create a new object unnecesarily ?

There is no harm in doing so.

Navaneeth How to use google | Ask smart questions

Abhishek Sur

Yes... RegisterStartupScript places the script after all the objects are rendered while RegisterClientScriptBlock places the JS at the beginning. Thus say you are calling a javascript using RegisterClientScriptBlock which gets an element, you will find this null, as the script gets executed just before any html is rendered. In case of RegisterStartupScript the script is placed after the html is generated. So If you want to place a javascript call in your html, always use RegisterStartupScript. Hope you got it. If not I can give you examples. :)

Abhishek Sur

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Abhishek Sur

Hey manas, as everybody else suggested... Referring to a variable to the same object doesnt actually create a variable. Rather it just places the pointer to the same variable if the reference is derived from Object. If its Value Types this would be different. Thus ClientScriptManager ClientScript = Page.ClientScript ClientScript.RegisterClientScriptBlock is same as Page.ClientScript.RegisterScriptBlock

Manas Bhardwaj wrote:

In Hindi, it means some one who is very close to heart. What does it mean in your language?

:-D In my language it means "Worship to God" :-D :-D . Cheers. :rose:

Abhishek Sur

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Md Marufuzzaman

Thanks for your excellent explanation..:)

I will not say I have failed 1000 times; I will say that I have discovered 1000 ways that can cause failure – Thomas Edison.

Don't forget to click [Vote] / [Good Answer] on the post(s) that helped you. Thanks Md. Marufuzzaman

Abhishek Sur

you are most welcome ... budd :cool:

Abhishek Sur

My Latest Articles **Create CLR objects in SQL Server 2005 C# Uncommon Keywords Read/Write Excel using OleDB

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