/// <summary>
/// Enables dynamic DNS resolution.
/// </summary>
/// <returns></returns>
public bool EnableDNS()
{
//Method closely resembles SetIpAddress, only changes will be highlighted.
this.ErrorMsg = string.Empty;
String ReturnValue = string.Empty;
//Declarations
ManagementClass NetConfig = null;
ManagementObjectCollection NetCol = null;
ManagementBaseObject ErrorCode = null;
ManagementBaseObject StaticParams = null;
//Set Objects.
try
{
NetConfig = new ManagementClass("Win32_NetworkAdapterConfiguration");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network adapter configuration object: {0}", err.Message);
return(false);
}
try
{
NetCol = NetConfig.GetInstances();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network instance collection object: {0}", err.Message);
return(false);
}
//Cycle instances.
foreach (ManagementObject NetAdapter in NetCol)
{
String Caption = (String)NetAdapter["Caption"];
if ((bool)NetAdapter["IPEnabled"] && !Caption.Contains("Microsoft TV/Video Connection"))
{
//Get Parameters
try
{
//The parameters and methods of SetDNSServerSearchOrder are used in this method.
StaticParams = NetAdapter.GetMethodParameters("SetDNSServerSearchOrder");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating parameters: {0}", err.Message);
return(false);
}
//Set Parameters
try
{
//Set DNSServerSearchOrder to null, causing the network adapter to use DNS.
StaticParams["DNSServerSearchOrder"] = null;
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error initializing parameters: {0}", err.Message);
return(false);
}
//Invoke Method.
try
{
//Call SetDNSServerSearchOrder method with null parameters.
ErrorCode = NetAdapter.InvokeMethod("SetDNSServerSearchOrder", StaticParams, null);
ReturnValue = ErrorCode.GetPropertyValue("ReturnValue").ToString();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error enabling DNS: {0}", err.Message);
return(false);
}
}
}
//Non Exceptional Errors.
switch (ReturnValue)
{
case "0":
return(true);
case "1":
this.ErrorMsg = string.Format("Restart required");
return(true);
default:
this.ErrorMsg = string.Format("Unexpected error, DNS not enabled: {0}", ReturnValue);
return(false);
}
}
//***Methods***\\
//These methods assume you are working on a computer with a single NIC.
/// <summary>
/// Sets the IP address of the local machine. Returns false if an error occurs.
/// </summary>
/// <param name="IPAddr">The new IP Address.</param>
/// <param name="SubnetMask">The new subnet mask.</param>
/// <param name="Gateway">(Optional)The defualt gateway for the machine. Pass null for defualt.</param>
/// <returns></returns>
public bool SetIpAddress(String IPAddr, String SubnetMask, String[] Gateway)
{
//Prepare error handle variables.
this.ErrorMsg = string.Empty;
String ReturnValue = string.Empty;
//Declare management objects as null.
ManagementClass NetConfig = null;
ManagementObjectCollection NetCol = null;
ManagementBaseObject StaticParams = null;
ManagementBaseObject GatewayParams = null;
ManagementBaseObject ErrorCode = null;
//Set Objects
try
{
//Sets netconfig object to all local machine network information.
NetConfig = new ManagementClass("Win32_NetworkAdapterConfiguration");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network adapter configuration: {0}", err.Message);
return(false);
}
try
{
//Gets all the specific network instances(this can and will include non network adapters.
NetCol = NetConfig.GetInstances();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network instance collection: {0}", err.Message);
return(false);
}
//Cycles instances.
foreach (ManagementObject NetAdapter in NetCol)
{
//This string is specifically used to avoid a network instance on Windows Embedded machines, Microsoft TV/Video Connection.
String Caption = (String)NetAdapter["Caption"];
//Checks a NetworkAdapterConfiguration property. Property checks if Internet Protocol is enabled on the network instance.
if ((bool)NetAdapter["IPEnabled"] && !Caption.Contains("Microsoft TV/Video Connection"))
{
//If enabled, instance is a network device. Also be careful of the possiblity of "fake" adapters.
//Get Parameters.
try
{
//StaticParams holds the parameters for the EnableStatic method.
StaticParams = NetAdapter.GetMethodParameters("EnableStatic");
//GatewayParams holds the parameters for the SetGateway method.
GatewayParams = NetAdapter.GetMethodParameters("SetGateways");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating parameters: {0}", err.Message);
return(false);
}
//Set Parameters.
try
{
//IPAddress and SubnetMask are string arrays so the parameters are passed as a new array.
StaticParams["IPAddress"] = new String[] { IPAddr };
StaticParams["SubnetMask"] = new String[] { SubnetMask };
//If gateway is null, generate defualt gateway.
if (Gateway == null)
{
//Creates a new string array based on the results of the method call.
Gateway = new String[] { DefualtGateway(IPAddr, SubnetMask) };
//If null the gateway creation failed.
if (Gateway == null)
{
this.ErrorMsg = string.Format("Error retrieving defualt gateway with IP {0} and Subnet {1}", IPAddr, SubnetMask);
return(false);
}
}
//Set DefaultIPGateway directly to the parameter.
GatewayParams["DefaultIPGateway"] = Gateway;
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error initializing parameters: {0}", err.Message);
return(false);
}
//Invoke Methods.
try
{
//Call the NetworkAdapterConfiguration method EnableStatic on the current network instance using the parameter object.
ErrorCode = NetAdapter.InvokeMethod("EnableStatic", StaticParams, null);
//The return value of the executed command is returned from the Errorcode object into ReturnValue.
ReturnValue = ErrorCode.GetPropertyValue("ReturnValue").ToString();
//If no errors are found, set the gateway as well.
if (ReturnValue == "0" || ReturnValue == "1")
{
ErrorCode = NetAdapter.InvokeMethod("SetGateways", GatewayParams, null);
ReturnValue = ErrorCode.GetPropertyValue("ReturnValue").ToString();
}
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error invoking methods: {0}", err.Message);
return(false);
}
}
}
//Non Exceptional Errors.
switch (ReturnValue)
{
case "0":
return(true);
case "1":
this.ErrorMsg = string.Format("Restart required");
return(true);
case "66":
this.ErrorMsg = string.Format("Invalid subnet mask {0}", SubnetMask);
return(false);
case "70":
this.ErrorMsg = string.Format("Invalid IP Address {0}", IPAddr);
return(false);
default:
this.ErrorMsg = string.Format("Unexpected error, IP address not set: Code {0}", ReturnValue);
return(false);
}
}
/// <summary>
/// Enables dynamic IP resolution.
/// </summary>
/// <returns></returns>
public bool EnableDHCP()
{
//Method closely resembles SetIpAddress, only changes will be highlighted.
this.ErrorMsg = string.Empty;
String ReturnValue = string.Empty;
ManagementClass NetConfig = null;
ManagementObjectCollection NetCol = null;
ManagementBaseObject ErrorCode = null;
//Objects
try
{
NetConfig = new ManagementClass("Win32_NetworkAdapterConfiguration");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network adapter configuration object: {0}", err.Message);
return(false);
}
try
{
NetCol = NetConfig.GetInstances();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network instance collection object: {0}", err.Message);
return(false);
}
//Cycles instances.
foreach (ManagementObject NetAdapter in NetCol)
{
String Caption = (String)NetAdapter["Caption"];
if ((bool)NetAdapter["IPEnabled"] && !Caption.Contains("Microsoft TV/Video Connection"))
{
//Invoke Methods.
try
{
//Invoke EnableDHCP method with no parameters.
ErrorCode = NetAdapter.InvokeMethod("EnableDHCP", null, null);
ReturnValue = ErrorCode.GetPropertyValue("ReturnValue").ToString();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error enabling DHCP: {0}", err.Message);
return(false);
}
}
}
//Non Exceptional Errors.
switch (ReturnValue)
{
case "0":
return(true);
case "1":
this.ErrorMsg = string.Format("Restart required");
return(true);
default:
this.ErrorMsg = string.Format("Unexpected error, DHCP not enabled: {0}", ReturnValue);
return(false);
}
}
/// <summary>
/// Sets or overwrites the DNS servers for the local machine.
/// </summary>
/// <param name="DNSservers">An array containing the IP address's of the servers to use.</param>
/// <param name="Replace">Set to true if the current DNS servers should be replaced.</param>
/// <returns></returns>
public bool SetDNSServers(String[] DNSservers, bool Replace)
{
//Method closely resembles SetIpAddress, only changes will be highlighted.
this.ErrorMsg = string.Empty;
String ReturnValue = string.Empty;
//Declarations
ManagementClass NetConfig = null;
ManagementObjectCollection NetCol = null;
ManagementBaseObject StaticParams = null;
ManagementBaseObject ErrorCode = null;
//Set Objects.
try
{
NetConfig = new ManagementClass("Win32_NetworkAdapterConfiguration");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network adapter configuration object: {0}", err.Message);
return(false);
}
try
{
NetCol = NetConfig.GetInstances();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating network instance collection object: {0}", err.Message);
return(false);
}
//Cycle instances.
foreach (ManagementObject NetAdapter in NetCol)
{
String Caption = (String)NetAdapter["Caption"];
if ((bool)NetAdapter["IPEnabled"] && !Caption.Contains("Microsoft TV/Video Connection"))
{
//Get Parameters.
try
{
//Gets SetDNSServerSearchOrder method parameters.
StaticParams = NetAdapter.GetMethodParameters("SetDNSServerSearchOrder");
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error creating parameters: {0}", err.Message);
return(false);
}
//Set Parameters.
try
{
//Checks if the parameter Replace is true or not.
if (Replace)
{
//If true, the current DNS servers are replaced by the new ones.
StaticParams["DNSServerSearchOrder"] = DNSservers;
}
else
{
//If false, the new DNS servers are added on to the current ones.
//Creates a new array containing the current DNS servers.
String[] CrntServers = (String[])NetAdapter["DNSServerSearchOrder"];
//Creates a dynamic array type List to hold both arrays.
List <String> list = new List <String>(CrntServers.Length + DNSservers.Length);
//Adds the current and new arrays to the list
list.AddRange(CrntServers);
list.AddRange(DNSservers);
//Sets parameter to the list as an array.
StaticParams["DNSServerSearchOrder"] = list.ToArray();
}
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error initializing parameters: {0}", err.Message);
return(false);
}
//Invoke Methods.
try
{
//Invoke the SetDNSServerSearchOrder at the new parameters.
ErrorCode = NetAdapter.InvokeMethod("SetDNSServerSearchOrder", StaticParams, null);
ReturnValue = ErrorCode.GetPropertyValue("ReturnValue").ToString();
}
catch (Exception err)
{
this.ErrorMsg = string.Format("Error invoking method: {0}", err.Message);
return(false);
}
}
}
//Non Exceptional Errors.
switch (ReturnValue)
{
case "0":
return(true);
case "1":
this.ErrorMsg = string.Format("Restart required");
return(true);
case "70":
this.ErrorMsg = string.Format("Invalid IP Address:");
for (int i = 0; i < DNSservers.Length; i++)
{
this.ErrorMsg += string.Format(" {0}", DNSservers[i]);
}
return(false);
default:
this.ErrorMsg = string.Format("Unexpected error, DNS not set: Code {0}", ReturnValue);
return(false);
}
}
