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.NET Tip

useful tip i feel ,

Using String.Format() Method.

Replaces each format specification in a specified String with the textual
equivalent of a

corresponding object's value
string strSQL;
strSQL = "SELECT * FROM Products ";
strSQL += " WHERE CategoryID = {0}";
strSQL += " AND SupplierID = {1}";
strSQL = String.Format(strSQL, 5, 12);

When this string comes back 5 will be placed where the {0} is located in the
string
and the 12 will be placed where the {1} is located.
"SELECT * FROM Products WHERE CategoryID = 5 AND SupplierID = 12"

amit agarwal
india
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.574 / Virus Database: 364 - Release Date: 1/29/2004
Nov 18 '05 #1
4 1093
It is better to use StringBuilder AppendFormat Method to accomplition the
same
For examlpe:
Dim strBld As New StringBuilder(String.Empty)

If textboxes.Count = 0 Then Exit Sub

For Each txt As TextBox In textboxes

strBld.AppendFormat("{0} {1}", txt.Text, vbCrLf)

Next

I agree it is very good tip!

Maxim

[www.ipattern.com do you?]
".NET Follower" <am*************@SoftHome.net> wrote in message
news:OL**************@TK2MSFTNGP09.phx.gbl...
useful tip i feel ,

Using String.Format() Method.

Replaces each format specification in a specified String with the textual
equivalent of a

corresponding object's value
string strSQL;
strSQL = "SELECT * FROM Products ";
strSQL += " WHERE CategoryID = {0}";
strSQL += " AND SupplierID = {1}";
strSQL = String.Format(strSQL, 5, 12);

When this string comes back 5 will be placed where the {0} is located in the string
and the 12 will be placed where the {1} is located.
"SELECT * FROM Products WHERE CategoryID = 5 AND SupplierID = 12"

amit agarwal
india
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.574 / Virus Database: 364 - Release Date: 1/29/2004

Nov 18 '05 #2
Is this actually more efficient than just doing the following?
int cat = 5;
int supply = 12;
string strSQL = "SELECT * FROM Products WHERE CategoryID=" + cat.ToString()
+ " AND SupplierID=" + supply.ToString();

".NET Follower" <am*************@SoftHome.net> wrote in message
news:OL**************@TK2MSFTNGP09.phx.gbl...
useful tip i feel ,

Using String.Format() Method.

Replaces each format specification in a specified String with the textual
equivalent of a

corresponding object's value
string strSQL;
strSQL = "SELECT * FROM Products ";
strSQL += " WHERE CategoryID = {0}";
strSQL += " AND SupplierID = {1}";
strSQL = String.Format(strSQL, 5, 12);

When this string comes back 5 will be placed where the {0} is located in the string
and the 12 will be placed where the {1} is located.
"SELECT * FROM Products WHERE CategoryID = 5 AND SupplierID = 12"

amit agarwal
india
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.574 / Virus Database: 364 - Release Date: 1/29/2004

Nov 18 '05 #3
Unfortunately, using string concatenation and string format to put
parameters into SQL commands also places you at higher risk for SQL
injection attacks.

--
Scott
http://www.OdeToCode.com

On Fri, 30 Jan 2004 14:00:07 +0530, ".NET Follower"
<am*************@SoftHome.net> wrote:
useful tip i feel ,

Using String.Format() Method.

Replaces each format specification in a specified String with the textual
equivalent of a

corresponding object's value
string strSQL;
strSQL = "SELECT * FROM Products ";
strSQL += " WHERE CategoryID = {0}";
strSQL += " AND SupplierID = {1}";
strSQL = String.Format(strSQL, 5, 12);

When this string comes back 5 will be placed where the {0} is located in the
string
and the 12 will be placed where the {1} is located.
"SELECT * FROM Products WHERE CategoryID = 5 AND SupplierID = 12"

amit agarwal
india
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.574 / Virus Database: 364 - Release Date: 1/29/2004


Nov 18 '05 #4
ya thats true!!

--
Thanks and Regards,

Amit Agarwal
Software Programmer(.NET)
"Scott Allen" <bitmask@[nospam].fred.net> wrote in message
news:4t********************************@4ax.com...
Unfortunately, using string concatenation and string format to put
parameters into SQL commands also places you at higher risk for SQL
injection attacks.

--
Scott
http://www.OdeToCode.com

On Fri, 30 Jan 2004 14:00:07 +0530, ".NET Follower"
<am*************@SoftHome.net> wrote:
useful tip i feel ,

Using String.Format() Method.

Replaces each format specification in a specified String with the textual
equivalent of a

corresponding object's value
string strSQL;
strSQL = "SELECT * FROM Products ";
strSQL += " WHERE CategoryID = {0}";
strSQL += " AND SupplierID = {1}";
strSQL = String.Format(strSQL, 5, 12);

When this string comes back 5 will be placed where the {0} is located in thestring
and the 12 will be placed where the {1} is located.
"SELECT * FROM Products WHERE CategoryID = 5 AND SupplierID = 12"

amit agarwal
india
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.574 / Virus Database: 364 - Release Date: 1/29/2004

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.574 / Virus Database: 364 - Release Date: 1/29/2004
Nov 18 '05 #5

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