StackOverflow2013

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plurals

PO
primarykey
Id
12276924
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-09-05T07:56:18.233
FavoriteCount
0
LastActivityDate
2012-09-05T07:56:18.233
LastEditDate
LastEditorUserId
0
OwnerUserId
232564
ParentId
12275771
PostTypeId
2
Score
3
ViewCount
0
LastEditorDisplayName
text
Body
If you can't filter the Textbox, you have to filter the data in the Postback . <ul> <li>Use Server.HtmlEncode(your text here) to Escape characters normally used for SQL Injection :</li> </ul> <blockquote> string userInput = @"' or 1=1; -- "; string encodedString = Server.HtmlEncode(userInput); </blockquote> the result will be : <pre><code>&#39; or 1=1; -- &lt;html&gt; </code></pre> <ul> <li>Use Regex to replace invalid characters with space or anything to indicate that the characters was replaced (use *) :</li> </ul> <blockquote> <pre><code>Regex myRegex = new Regex("[\\\'\\\"\\<\\>=]", RegexOptions.Compiled | RegexOptions.IgnoreCase); string userInput = @"' or 1=1; -- <html>"; string encodedString = myRegex.Replace(userInput, ""); </code></pre> </blockquote> the result will be : <blockquote> or 11; -- html </blockquote> <ul> <li>Use parameters in your SQL queries and validate the values before add the</li> </ul> <blockquote> using (SqlConnection cn = new SqlConnection("Your Connection string here")) { <pre><code> using (SqlCommand cmd = new SqlCommand()) { cmd.Connection = cn; cmd.CommandType = CommandType.Text; cmd.CommandText = "Select * From [User] Where (UserName = @UserName AND Password = @Password)"; cmd.Parameters.Add("@UserName", SqlDbType.NVarChar).Value = Server.HtmlEncode(txtUserName.Text); cmd.Parameters.Add("@Password", SqlDbType.NVarChar).Value = Server.HtmlEncode(txtPassword.Text); cn.Open(); IDataReader reader = cmd.ExecuteReader(); if (reader.Read()) { // Your code here } } } </code></pre> </blockquote> <ul> <li>There is custom controls ready to use with options to control what the user can enter in specified text box .</li> <li>Last advice in Web programming you have to double check (1- Client side using JavaScript) and (2- Server side using your own rules of doubts and concerns).</li> </ul>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POhow to prevent from sql injection for text boxes on both sides client / server
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USkhaled
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POhow to prevent from sql injection for text boxes on both sides client / server
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.