C#

barbarini wrote:

I need some code to prevent my application from running if it is already running. c# visual studio 2005

DataTable dt= new DataTable();

DataTable dt = null;

if (gdvDistributorSlab.DataSource == null)
{
  dt= new DataTable;
}
else
{
  dt = (DataTable)gdvDistributorSlab.DataSource;
}

Prog-hero wrote:

I am using ASP.NET.
Do we need to do anything regarding session management or it is automatic? If I am using IIS server. I run the script called Installsqlstate.sql and two table created in the tempdb.

Be Well
Regards,
Prog-hero

ConnectionOptions conn = new ConnectionOptions();
conn.Impersonation = ImpersonationLevel.Impersonate;
ManagementScope scope = new ManagementScope(@"\\mymachine", conn);
ObjectQuery query = new ObjectQuery("Select * From Win32_LogicalDisk Where DriveType = 4");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection coll = searcher.Get();

foreach (ManagementObject obj in coll)
{
    Console.WriteLine(obj["DeviceID"].ToString());
    Console.WriteLine(obj["ProviderName"].ToString());
}

using System.Runtime.InteropServices;

[DllImport("Kernel32.dll")]
internal static extern uint QueryDosDevice(string lpDeviceName,
    StringBuilder lpTargetPath, uint ucchMax);

internal static string DriveIsMappedTo(string driveLetter)
{
    const string MAPPED_FOLDER_INDICATOR = @"\??\";
    StringBuilder volumeMap = new StringBuilder(512);
    string mappedVolumeName = "";

    uint mapped = QueryDosDevice(driveLetter, volumeMap, (uint)512);
    if (mapped != 0)
        if (volumeMap.ToString().StartsWith(MAPPED_FOLDER_INDICATOR) == true)
        {
            mappedVolumeName = volumeMap.ToString().Substring(4);
        }
    return mappedVolumeName;
}