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How To Validate Primary Key

Hello, Can Anyone Tell me how to validate primary key ..The user will give the primary key value if the the value is already existing in the database it should show like the id is already taken How to...

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Object reference not set to an instance of an object.

I have developed a project in .Netfromework 3.5., I used linQ also... Its working in my local machine.Now my hosting server have .net fromwork2.0 and 4.0, I have pushed under 4.0 version, but i run...

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GridView1 format performance problem

Before Exporting right format from GridView to Excel, I need to format GridView using GridView1_RowDataBound.But, doing so will affact performace. (about 10 time slow)Is there another way to format...

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Dynamically Form in ASP.NET C#

HiI created a form with name's InputQuiz. In form of InputQuiz, I insert the total of the question for the quiz, and the name for the quiz. When click button submit, the pages will be direct to...

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Reading Excel sheet to database

Hi,I have exported an excel sheet having 4 rows.I have added 1 more row to that same exported excel sheet manually.Now, when i'm trying to import that excel sheet, the reader reads only 4 rows while...

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Multiple asynchronous file upload asp.net

I am using Ajax asynchronous file upload control in asp.net. In my application there are 2 such upload controls. When i am uploading one file at a time, both files are getting uploaded. But when i am...

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help regarding affiliate tracking software

iam looking for sample code /tutorial, to make an affiliate/ad network program like vcommission, dgm

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One user process should wait until the other user process gets completed.

Dear members,I have one aspx page with a function (under submit button).My requirement is, in case if two different users clicks on the submit button at the same time. Then User2's process should wait...

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500 - Internal server error.There is a problem with the resource you are...

Hi Allasp.net web site runs ok on my machine in vs2010. But when run the live on to server and get this error . 500 - Internal server error.There is a problem with the resource you are looking for, and...

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Microsoft Word 12.0 Object Library on server

Hi, I have using Microsoft Word 12.0 Object Library in Asp.net Web Application for reading the Full text from a word file into a variable v.Every thing is working fine on my PC but when i upload...

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Problem in applying custom client side validation with masking in textbox

I am using dev Express textboxes having MaskSettings-Mask="$<0..99999999g>" to take input in currency format.Now i want that the value inserted in first textbox must be greater than$10,000 and...

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Responsive Web Design examples

Can someone give me examples for fluid responsive web design for aspx web forms ( using mostly css)Please help me.Thank you

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Send eMail to international charecter email address

Hi,Im trying to send email  to a chinese person,whoes email id in chinese(ex : 伊昭傑@郵件.商務 ), unfrotunatly our .net program is not support this email id , is there any possible way to send email to this...

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How to assign a default value to a textbox insert template. Thanks

I want the user to first enter a value into a textbox insert template before selecting a value from a dropdownlist, in order to avoid aInvalidCastException. I needed help handling this exception. Maybe...

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Ajax toolkit 4 with visual studio 2010

I have a problemItry to add Ajaxtoolkit4 to toolboxvisual studioandnotapparently happensbecausethe componentsare added,but thennot be selected.I searchedvarious forumsand can not findanswer.Please...

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Possible? Use a string variable to call a class in C#

Is it possible to call class using a variable name? I have 6 functions that are ALL the same except the class they call points to specific other functions for that specific class.Is there a way I can...

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Print/Email Attachments in ASP.Net/C#

Hi all,I have a page named Receipt Store whic displays various uploaded attachments by users. Links get displayed in the page which upon clicking display pop up which asks user to Save/Open attachment....

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OLE Objects

My project is using an Access DB (i know) and in one of the tables there is an OLE Object data type.  This field is storing Word, Excel, PowerPoint and Outlook messages.  It's embedded in the database...

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Having trouble with a dynamically built tab control

Hello All,I am trying to dynamically build an asp.net tab control using button, multiview and view controls.The issue that I have is when the button is pressed, the OnClientClick event will set the...

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Problem GMaps subgurim with Formview

When Use Gmaps in Formview (InsertItemTemplate) ,Gmaps Fail Load .Please Help me 

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