dynamically change the html table tag width which is in string

Question

I am doing a CLR procedure of sending mail, I have composed the html into my string , After binding some dynamic values I have been able to send mail.

But Now the issue is , I am getting a string which containing the HTML, So I want to find the first <table> and then change its width. it.[Due to large width the template is disturbing]. This is the body of the email.

 string StrHtml =" <table cellspacing='1' cellpadding='10' border='0'
style='width:880px'></table>"

I want to change the style='width:880px' to style='width:550px'

I am doing this code only in class library. what is the best way to do this?

My Code is :

string ImgPath = string.Empty;
ImgPath = Convert.ToString(ds.Tables[0].Rows[i]["GroupMessage"]);
string pattern = string.Empty;
pattern = System.Text.RegularExpressions.Regex.(ImgPath, "(<table.*?>.*</table>", System.Text.RegularExpressions.RegexOptions.IgnoreCase).Groups[1].Value;  

MailMessage message = new MailMessage();
message.AlternateViews.Add(htmlMail);
message.Body = ImgPath ; //
message.IsBodyHtml = true;
//Other mail sending code here.....

Show the code where you are writing this StrHtml to html file — Sami
– Sami, Commented Nov 5, 2012 at 10:28
Hi, thanks for reply, But everytime the width is not 880px, this is coming dynamically. — Chetan
– Chetan, Commented Nov 5, 2012 at 10:42
will the style attribute only ever contain a width parameter? — paul
– paul, Commented Nov 5, 2012 at 10:53
No, In whole table there may be image tag, that also the style with width attributes. — Chetan
– Chetan, Commented Nov 5, 2012 at 10:54

paul · Accepted Answer · 2012-11-05 10:35:41Z

2

you could use the HtmlAgilityPack, and something like this:

HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();
htmlDoc.LoadHtml(StrHtml);

var tableNode = ( from node in htmlDoc.DocumentNode.Descendants()
                 where node.Name == "table"
                 select node ).FirstOrDefault();

if ( tableNode != null ) {
    tableNode.Attributes["style"].Value = 
        tableNode.Attributes["style"].Value.Replace("880px", "550px");
}

answered Nov 5, 2012 at 10:35

paul

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1 Comment

Chetan Over a year ago

Thanks for reply, I don't want to add any external reference to my class library. Because I want to create sql assembly from this dll.

Amiram Korach · Accepted Answer · 2012-11-05 10:37:35Z

0

You can do this with XDocument:

    using (var reader = new StringReader(StrHtml))
    {
       var doc = XDocument.Load(reader);
       var table = doc.Descendants("table").FirstOrDefault();
       if (table != null)
       {
           var style = table.Attribute("Style");
           if (style != null)
               style.Value = "width:550px";
       }
    }

answered Nov 5, 2012 at 10:37

Amiram Korach

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5 Comments

Chetan Over a year ago

Hello, I am doing this in class library, I want to create DLL to create assembly in SQL 2008. So for this I need to add Linq namespace, Adding external reference is not allowing while creating assembly in SQL

paul Over a year ago

be aware that this will only work if your html forms valid xml (which will not necessarily always be the case)

Chetan Over a year ago

Hello, sir, Can I do it @ SQL end, Any suggestion ?

Amiram Korach Over a year ago

updates.sqlservervideos.com/2010/07/…

Chetan Over a year ago

Thanks you, I am checking the link.

Tyress · Accepted Answer · 2012-11-06 09:21:42Z

0

What's wrong with just this?

StrHtml = StrHtml.Replace("880px","550px");

Or was that just an example? Sorry it isn't clear.

EDIT:

With Regex (using System.Text.RegularExpressions;):

StrHtml = Regex.Replace(StrHtml, "width:[\d]*px", "width:550px");

Please note that the "width:(numbers)px" text must exist (and width must be in the same lower case as the Regex) or you will get an exception. But then, just surround it with a try{StrHtml = Regex.Replace(StrHtml, "width:[\d]*px", "width:550px");}catch{} and you'll be fine

FINAL FINAL EDIT:

You want to get the style width for only the table tag, I gather:

try{
StrHtml = Regex.Replace(StrHtml, @"(<table[\s\S]*)(width:[\d]*px)(.*?>)", @"$1width:550px$3");
}
catch{}

edited Nov 6, 2012 at 9:21

answered Nov 5, 2012 at 10:38

Tyress

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1 Comment

Chetan Over a year ago

I try this, But Every time is is not 880px, It is always changing. Every time I don't know the table width size.

Chetan · Accepted Answer · 2012-11-07 12:36:48Z

I am getting the html string in below format and I want to get only the attribute value of style="width: 880px" , which is always changing.[This is only work if the width is mention in style tag. And that is the my case.]

ImgPath ==>

 <table border="0" cellpadding="10" cellspacing="1" style="width: 880px">
    // some other code goes here
    </html>

Answer ==> I used regular expression in my class, [want to make DLL file from that class]

string StrStyTag = string.Empty;
StrStyTag = System.Text.RegularExpressions.Regex.Match(ImgPath, "<table.+?style=(.+?)>", System.Text.RegularExpressions.RegexOptions.IgnoreCase).Groups[1].Value;

I am getting the value as ==> "width: 880px", So after doing some string manipulations I make the 880px to fix 550px.

Thanks for all those who help me to resolved it.

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