TcAdsClient.ReadAnyString Method (Int32, Int32, Encoding)
Reads the string.
Namespace: TwinCAT.Ads
Assembly: TwinCAT.Ads (in TwinCAT.Ads.dll)
Version: 4.3.0.0
Syntax
C#
public string ReadAnyString(
int variableHandle,
int len,
Encoding encoding
)
VB
Public Function ReadAnyString (
variableHandle As Integer,
len As Integer,
encoding As Encoding
) As String
Parameters
|
variableHandle |
Type: System.Int32 |
|
len |
Type: System.Int32 |
|
encoding |
Type: System.Text.Encoding |
Return Value
Type: String
System.String.
Examples
The following code shows how to Read/Write string values with the ANY concept.
Read/Write Any Strings
using (TcAdsClient client = new TcAdsClient())
{
client.Connect(851); // Connect to local port 851 (PLC)
int stringHandle = client.CreateVariableHandle("MAIN.string"); // Symbol "string" defined in MAIN as STRING
int wStringHandle = client.CreateVariableHandle("MAIN.wstring"); // Symbol "string" defined in MAIN as WSTRING
try
{
string str = client.ReadAnyString(stringHandle, 80, Encoding.Default);
string wStr = client.ReadAnyString(wStringHandle, 80, Encoding.Unicode);
string changedValue = "Changed";
// Attention, take care that the memory of the string in the process image is not exceeded!
client.WriteAnyString(stringHandle, changedValue, 80, Encoding.Default);
client.WriteAnyString(wStringHandle, changedValue, 80, Encoding.Unicode);
}
finally
{
client.DeleteVariableHandle(stringHandle);
client.DeleteVariableHandle(wStringHandle);
}
}