How to get Mac ID using VB.net / C#.net

mac id -Media Access Control ID
you have to add reference of
Imports Microsoft.Win32
Imports System.Management
Imports System.IO

VB::

Dim mc As ManagementClass = New ManagementClass("Win32_NetworkAdapterConfiguration")
Dim moc As ManagementObjectCollection = mc.GetInstances()

For Each mo As ManagementObject In moc

If (MACAddress = String.Empty) Then ' only return MAC Address from first card

If Convert.ToBoolean(mo("IPEnabled")) = True Then
MACAddress = mo("MacAddress").ToString()


mo.Dispose()
End If
End If

Next
MessageBox.Show(MACAddress)


C#:

ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = mc.GetInstances();
string MACAddress = String.Empty;
foreach (ManagementObject mo in moc)
{
if (MACAddress == String.Empty) // only return MAC Address from first card
{
if ((bool)mo["IPEnabled"] == true) MACAddress = mo["MacAddress"].ToString();
}
mo.Dispose();
}

MACAddress = MACAddress.Replace(":", "");
MessageBox.Show(MACAddress);

Difference between two dates in C#

public int GetTotalDays(DateTime startedDateTime)

{

//get the current date

DateTime nowDate = System.DateTime.Now;

//use timespan to get the number of days

System.TimeSpan span = nowDate - startedDateTime;

int days = (int)span.TotalDays;

return days;

}

want to revere a string ??? solution is here c# ,VB

we can reverse a string in so many methods..
method 1

string str="Suresh Varma";
char[] rev=str.ToChatArray(str);
Array.Reverse(rev);
Response.Write(new string(rev));

out put...> amraV hseruS


method 2:

string str="9000588819";
string rev="";
for ( int i=0;i < str.length;i++)
{
rev+=str.SubString(str.length-i,1);
}
response.write(rev);


o/p 9188850009

method 3:(works only in VB.net)

Import Microsoft.VisualBasic

dim str as new string=strReverse("varma")
response.Write(str)


o/p amrav

How to make ASP.Net FileUpload control readonly

We can make the ASP.Net FileUpload control readonly by setting the ContentEditable property to false.
in .aspx file write.... fileupload id="fileUpload1" runat="server" contenteditable="false"

note : intellisence won't shows ContentEditable property.

The other way of achieving it by restricting users to type in any characters i.e. return false on key press, key up and on paste event to prevent users pasting any values directly.

Refer the below code snippet that helps in doing that,

fileUploadSri.Attributes.Add("onkeypress", "return false;");
fileUploadSri.Attributes.Add("onkeyup", "return false;");
fileUploadSri.Attributes.Add("onpaste", "return false;");

how to send E-Mail from your asp.net web site

use namespace System.Net.Mail;

use this code in send button click oe where ever u want
try
{
SmtpClient sc = new SmtpClient("smtp.gmail.com", 25);
sc.EnableSsl = true;
sc.Credentials = new System.Net.NetworkCredential(TextFrom.Text, textPwd.Text);
sc.Send(TextFrom.Text, TextTo.Text, TextSubject.Text, TextMatter.Text);
Label1.Text = "Your Message sent Successfully";

}
catch
{
Label1.Text = "An Error has occured;Plz Enter Valid data";
}

Can we use two different Languages in one website development?

Yes,But we have to follow some rules.

add /App_Code folder to your solution .

make two sub-folders

like:

App_Code
/VB (Your sub folder name)
myClass1.vb (Your class coded in VB)

/CS (Your sub folder name)
myClass2.cs (Your Class coded in C#)

after that go to web.config file
< compilation > <codesubdirectories>compilation
< codeSubDirectories >
< add directoryName="VB" > < "/add" >
< add directoryName="CS"">""<"/add" >
< codeSubDirectories" >
&lt /compilation >
< codesubdirectories >
< add directoryname="VB" > < /add >
< add directoryname="CS" > </add >
< codesubdirectories >
< /codesubdirectories > < codesubdirectories >
< add directoryname="CS" > </add >
< codesubdirectories >
< /codesubdirectories > < compilation < > codesubdirectories > < add directoryname="VB" > < /add > < add directoryname="CS" > < /add > < codesubdirectories > </codesubdirectories >

< /codesubdirectories >
</compilation >

//Note:You are not required to name them "VB" and "CS"{Sub-folder names} as we did ,You can use whatever name tickles your fancy.

How to set maximum length to Multiline TextBox in ASP.NET 2.0

First of all this is a bug in .net..We cant set MaxLength while property of TextBox is set to Multiline.
We can achieve this by using regular expression validator.
<asp:RegularExpressionValidator ID="MaxLengthValidator" ControlToValidate="AddersTxtbox" Text="Max length is 20" ValidationExpression="^[\s\S]{0,20}$" runat="server" />