private static List <string> GetAllPrintersInternal(int failCounter)
{
try
{
List <string> printers = new List <string>();
string selectAllQuery = "SELECT * FROM Win32_Printer";
System.Management.ObjectQuery oq = new System.Management.ObjectQuery(selectAllQuery);
System.Management.ManagementObjectSearcher query1 = new System.Management.ManagementObjectSearcher(oq);
System.Management.ManagementObjectCollection queryCollection1 = query1.Get();
foreach (System.Management.ManagementObject mo in queryCollection1)
{
System.Management.PropertyDataCollection pdc = mo.Properties;
printers.Add(mo["Name"].ToString());
}
return(printers);
}
catch
{
if (failCounter > 3)
{
throw;
}
Thread.Sleep(new TimeSpan(0, 0, 5));
return(GetAllPrintersInternal(++failCounter));
}
}
/// <summary>
/// Returns a CSV-formatted string containing the requested WMI table.
/// </summary>
/// <param name="inKey">WMI target table</param>
/// <returns>CSV string</returns>
public string readWMIKeyAsCSV(string inKey)
{
System.Text.StringBuilder sbOut = new System.Text.StringBuilder();
System.Management.ManagementObjectSearcher mbs = new System.Management.ManagementObjectSearcher("SELECT * FROM " + inKey);
try {
foreach (System.Management.ManagementObject mo in mbs.Get())
{
System.Management.PropertyDataCollection searcherProperties = mo.Properties;
foreach (System.Management.PropertyData sp in searcherProperties)
{
sbOut.AppendLine(sp.Name + ";" + sp.Value);
}
}
} catch (Exception ex) {
sbOut.AppendLine("Error;" + ex.Message);
}
return(sbOut.ToString());
}
/// <summary>
/// Reads a specified value from any WMI table.
/// </summary>
/// <param name="inKey">WMI target table</param>
/// <param name="inAttribute">WMI attribute to read</param>
/// <returns>Value as object</returns>
public object readWMICompound(string inKey, string inAttribute)
{
System.Management.ManagementObjectSearcher mbs = new System.Management.ManagementObjectSearcher("SELECT * FROM " + inKey);
try {
foreach (System.Management.ManagementObject mo in mbs.Get())
{
System.Management.PropertyDataCollection searcherProperties = mo.Properties;
foreach (System.Management.PropertyData sp in searcherProperties)
{
if (sp.Name.ToLower() == inAttribute.ToLower())
{
return(sp.Value);
}
}
}
return(null);
} catch (Exception ex) {
return("Error: " + ex.Message);
}
}
public static void SetNewDefaultPrinter(string newDefaultPrinterName)
{
string selectAllQuery = "SELECT * FROM Win32_Printer";
System.Management.ObjectQuery oq = new System.Management.ObjectQuery(selectAllQuery);
System.Management.ManagementObjectSearcher query1 = new System.Management.ManagementObjectSearcher(oq);
System.Management.ManagementObjectCollection queryCollection1 = query1.Get();
System.Management.ManagementObject newDefault = null;
foreach (System.Management.ManagementObject mo in queryCollection1)
{
System.Management.PropertyDataCollection pdc = mo.Properties;
if (mo["Name"].ToString().ToUpper().Trim() == newDefaultPrinterName.ToUpper())
{
newDefault = mo;
break;
}
}
if (newDefault != null)
{
System.Management.ManagementBaseObject outParams = newDefault.InvokeMethod("SetDefaultPrinter", null, null);
string returnValue = outParams["returnValue"].ToString();
if (returnValue != "0")
{
throw new ApplicationException(string.Format("Change Printer '{0}' failed. Return Value: {1}", newDefault.ToString(), returnValue));
}
var HWND_BROADCAST = new IntPtr(0xffff);
uint WM_SETTINGCHANGE = 0x001A;
UIntPtr innerPinvokeResult;
var pinvokeResult = SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, UIntPtr.Zero,
IntPtr.Zero, SendMessageTimeoutFlags.SMTO_NORMAL, 1000, out innerPinvokeResult);
}
else
{
throw new ApplicationException(string.Format("Change Printer '{0}' failed. Managemengt object not found", newDefaultPrinterName));
}
}
/// <summary>
/// Get a list of important WMI tables plus all names and values.
/// </summary>
/// <returns>String</returns>
public string listImportantCompounds()
{
System.Text.StringBuilder sbOut = new System.Text.StringBuilder();
for (int i = 0; i < itemList.Length; i++)
{
sbOut.AppendLine("===== ===== ===== ===== ===== ===== ===== ===== ===== =====");
sbOut.AppendLine(itemList[i].ToUpper() + ":\n");
System.Management.ManagementObjectSearcher mbs = new System.Management.ManagementObjectSearcher("SELECT * FROM " + itemList[i]);
try {
foreach (System.Management.ManagementObject mo in mbs.Get())
{
System.Management.PropertyDataCollection searcherProperties = mo.Properties;
foreach (System.Management.PropertyData sp in searcherProperties)
{
sbOut.AppendLine(sp.Name + " = '" + sp.Value + "'");
}
}
} catch (Exception ex) {
sbOut.AppendLine("Error: " + ex.Message);
}
}
return(sbOut.ToString());
}
private static IEnumerable <System.Management.PropertyData> getPropertiesList(System.Management.PropertyDataCollection propertyCollection)
{
foreach (var p in propertyCollection)
{
yield return(p);
}
}
