public override object ReadTag(Tag tag)
{
if (tag.AccessType == TagAccessType.Read || tag.AccessType == TagAccessType.ReadWrite)
{
try
{
if (tag.TagType == "bool")
{
var res = PLC.ReadBool(tag.Address);
if (res.IsSuccess)
{
tag.TagValue = res.Content;
tag.Quality = Quality.Good;
}
else
{
tag.TagValue = null;
tag.Quality = Quality.Bad;
}
}
else if (tag.TagType == "string" || tag.Address.Contains("#"))
{
string address = tag.Address.Split('#')[0];
ushort len = Convert.ToUInt16(tag.Address.Split('#')[1]);
OperateResult <string> res = PLC.ReadString(tag.Address, len, Encoding.ASCII);
if (res.IsSuccess)
{
string strval = res.Content;//.Length >= len ? res.Content.Substring(0, len) : res.Content;
tag.TagValue = strval.Replace("\0", "");
tag.Quality = Quality.Good;
}
else
{
tag.TagValue = null;
tag.Quality = Quality.Bad;
}
}
else
{
OperateResult <byte[]> res = PLC.Read(tag.Address, 1);
ConvertUtils.DecodeTagValue(tag, res);
}
return(tag.TagValue);
}
catch (Exception ex)
{
LOG.Error($"Datasource[{SourceName}] read error. Tag[{tag.TagName}] Address[{tag.Address}] Message[{ex.Message}]");
tag.TagValue = null;
tag.Quality = Quality.Bad;
return(tag.TagValue);
}
}
else
{
return(null);
}
}
private void button_read_string_Click(object sender, EventArgs e)
{
// 读取字符串
DemoUtils.ReadResultRender(toyopuc_net.ReadString(textBox3.Text, ushort.Parse(textBox5.Text)), textBox3.Text, textBox4);
}