/// <summary>
/// Get a handle from a variable name
/// </summary>
/// <param name="varName">A twincat variable like ".XXX"</param>
/// <returns>The handle</returns>
public uint GetSymhandleByName(string varName)
{
// Check, if the handle is already present.
lock (activeSymhandlesLock)
{
if (activeSymhandles.ContainsKey(varName))
{
return(activeSymhandles[varName]);
}
}
// It was not retrieved before - get it from the control.
var adsCommand = new AdsWriteReadCommand(0x0000F003, 0x00000000, varName.ToAdsBytes(), 4);
var result = adsCommand.Run(this.ams);
if (result == null || result.Data == null || result.Data.Length < 4)
{
return(0);
}
var handle = BitConverter.ToUInt32(result.Data, 0);
// Now, try to add it.
lock (activeSymhandlesLock)
{
if (!activeSymhandles.ContainsKey(varName))
{
activeSymhandles.Add(varName, handle);
}
return(handle);
}
}
/// <summary>
/// Get a handle from a variable name
/// </summary>
/// <param name="varName">A twincat variable like ".XXX"</param>
/// <returns>The handle</returns>
public uint GetSymhandleByName(string varName)
{
AdsWriteReadCommand adsCommand = new AdsWriteReadCommand(0x0000F003, 0x00000000, varName.ToAdsBytes(), 4);
var result = adsCommand.Run(this.ams);
var handle = BitConverter.ToUInt32(result.Data, 0);
activeSymhandles.Add(handle);
return(handle);
}
