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asp insert html sql server

Posted on 2012-03-15
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what is the best way to insert/retrieve html from asp to SQL server ?
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Question by:goodluck11
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by:Dave Baldwin
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It depends.  This search http://www.google.com/search?q=asp+to+SQL+serve will bring up a lot of possibilities including this http://support.microsoft.com/kb/169377 from Microsoft.

Your question is very general.  You would get better answers if you give us some more detail about your code and resources.  Which SQL Server?  Which version of IIS?  And what are you actually wanting to do in the way of an application?
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by:goodluck11
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sql server 2008
IIS 7
We have a textbox on asp, we want the user to enter html code, save it on the server, and can be displayed on another asp page.
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by:goodluck11
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those are general access to sql server.

we are looking to insert html specifically with asp
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by:Dave Baldwin
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HTML is nothing but text until a web browser has to interpret it as a page.  So you can enter the HTML in a text box, save it to the SQL Server, and retrieve it on another page and display it.  Nothing magic about it being HTML.  You will need to follow standard practice for escaping characters and all that to prevent SQL injection that might damage the contents of your SQL server.
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by:goodluck11
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don't we need to escape special chars or encode/decode when inserting/retrieving ?

Some thing like this saved on the server ?

<div class="Social-Links"> <a href="http://www.facebook.com

and then decode it when displaying to browser ?
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by:Dave Baldwin
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You can do that but preventing SQL injection is more important.  This page from Microsoft http://msdn.microsoft.com/en-us/library/ms161953.aspx addresses that issue.  You should always check for the ';' character and single quotes.  

I also truncate input to the proper size to prevent overflow problems.  You might be surprised how often people try to post complete and large web pages full of links to a textbox.  I also keep track of any detected errors in the data and abort if there are any.

Remember that most spam and hacking attempts skip your forms and go directly to your 'action' page.  While javascript validation can help the user enter the data correctly, it does nothing to prevent a direct attack or submission.
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by:Big Monty
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regarding sql injection, I would recommend using the COMMAND object when saving to the database, that way you dont have to worry about checking for different attack styles, the database side of things would handle that. you would just specify the input type (text, number, whatever) and the command would treat whatevers entered as the parameter.

if this is going to be a public page, I would do a check for <script> tags, as this could allow users to embed dangerous HTML

more on the command object:
http://www.w3schools.com/ado/ado_ref_command.asp
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by:goodluck11
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Thanks, can someone show a sample code how to do this ?

do we need to escape the html code before saving it ?
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goodluck11 earned 0 total points
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we are doing something like this on c# and rad this is safe (from injections)


    SqlCommand cmd = conn.CreateCommand();

                cmd.CommandText = "insert into htmltemplates (htmltemplate) values (@Text)";
                cmd.Parameters.AddWithValue("@Text", TextBox5.Text);
                cmd.ExecuteNonQuery();
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by:Big Monty
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the link i provided has sample code for using the command object. are you looking for classic asp examples or asp.net examples?
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by:goodluck11
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thanks for your reply, we are looking for classic asp and haven't found it
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by:goodluck11
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solution
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by:Big Monty
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Was the link I provided not exactly what you need? If not please explain what about it didn't meet your requirements.
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