Web Forms :: Read Excel Files In Pure C# Without Using OleDB Connection

May 23, 2012

I am Importing an excel file using oledb connection in asp.net.

but it is not working on server.

now i want to read excel file without interop.

How can i do it.

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I got an error about OleDB. I just want my excel file import to Gridview. Here is my code.

string connstr =
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When i build project there is no error but when i run this project i got an error like this:

System.ArgumentException:Format of the
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Line 21: string connstr =
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Line 22: Line 23:
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We're converting a Classic ASP site to an ASP.NET site. One function was to upload a 'template' of data in CSV format for importing into the database. There were several different record types in there (the first field always indentifies the type of data).

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Code has been simplified, "information ..." in the sql insertion command represents 1803 characters.

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Web Forms :: How To Read Encrypted Connection String In Role Manager

Jul 17, 2015

i don't know how to use a Encrypted ConnectionString with RoleManager in ASP.NET This is code in Web.config. 

<add name="strConnectionString" connectionString="eF8w9r2UJOsk0Ps3pxmV7/Fy/xPR2hN2S7BrC1iOYNnAUaI8AqkSm5bw7r+ta4sePWSV9t/3Spnpz6wsFpvMmcppNpqM5Zk7iiDqWVgIV4k="/>
<roleManager enabled="true" defaultProvider="CustomizedRoleProvider">

[Code] ....

And in project I create a library to read web config

 private const string ConnectionStringKey = "strConnectionString";
private readonly string SQLConnectionString =

if I change my ConnectionString like this, it's working: 

<add name="strConnectionString" connectionString="server=My-PCMSSQL2008; database=MyDB; uid=sa; pwd=passw0rd;"/>

But I want my ConnectionString Encrypted so i use

 <add name="strConnectionString" connectionString="eF8w9r2UJOsk0Ps3pxmV7/Fy/xPR2hN2S7BrC1iOYNnAUaI8AqkSm5bw7r+ta4sePWSV9t/3Spnpz6wsFpvMmcppNpqM5Zk7iiDqWVgIV4k="/>

So when i running website it throw error:

System.ArgumentException:Keyword not supported: 'eF8w9r2UJOsk0Ps3pxmV7/Fy/xPR2hN2S7BrC1iOYNnAUaI8AqkSm5bw7r+ta4sePWSV9t/3Spnpz6wsFpvMmcppNpqM5Zk7iiDqWVgIV4k='.

Line 46: string[] roleNames;
Line 47: roleNames = Roles.GetAllRoles();

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Web Forms :: Read Url From Excel Link?

Feb 19, 2010


is it possible to read url link from excel file?

I have in excel link like:


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I'm populating a generic list from an excel file that contains names of pdf files. Now I want to take each item in the list and create a file from it. Here's what I have so far:


So now, the list called lines contains names of 900 pdf files. How would I take those names out of the list and create files from them?

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Web Forms :: How To Read Particular Data From Excel Using Placeholder

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I have an excel sheet in that all the data is added what i want is my webpage should be change as soon as i modify my excel Sheet and automatically a new aspx page generate if any data will add in excel sheet.

I need to create the CMS of my webpage which will be totally dynamic and record must be store and read from excel only.

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I am having two text boxes in a form (ASP) when I entered the value in text box it is passed to excel sheet .I am doing some calculation in excel-2003 for example(A+B=C).I am able to pass text box values to excel but I am unable to retrieve the calculated value from excel to the form. In Excel sheet the result is getting updated.

Coding to read updated value from excel to asp.

Dim objConn
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<Form name="FrmFeeStrM">

[Code] ....

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