private void SaveValue_Click(object sender, EventArgs e)
{
//读取当前信号的信号名
string SignalName = Form1.SelectedChildNodeName;
SignalName = SignalName.Remove(0, 3);
//读取当前信号所属信息的ID
string MessageIDStr = Form1.selectedParentNodeName;
MessageIDStr = MessageIDStr.Remove(0, 3);
int MessageIDInt = int.Parse(MessageIDStr);
//第一步把用户输入的物理值转换为十进制
string InputPhysicsValue = InputTextBox.Text.ToString().Trim();
int PhysicsValueInt = int.Parse(InputPhysicsValue);
//第二步读取当前信号的(A，B)的值
LINQDataContext context = new LINQDataContext();
var query = from sg in context.SendSignal
where sg.Signal_Name == SignalName && sg.ID == MessageIDInt
select sg;
string ABValue = null;
foreach (var item in query)
{
ABValue = item._A_B_;
}
int SplitIndexStart = ABValue.IndexOf(",");
string AValueStr = ABValue.Substring(1, SplitIndexStart - 1);
int SplitIndexEnd = ABValue.IndexOf(")");
string BValueStr = ABValue.Substring(SplitIndexStart + 1, SplitIndexEnd - SplitIndexStart - 1);
int AValueInt = int.Parse(AValueStr);
int BValueInt = int.Parse(BValueStr);
//第三步计算信号值，并且转换为十六进制
int SignalValue = (PhysicsValueInt - BValueInt) / AValueInt;
String str = SignalValue.ToString("x8");
MessageBox.Show(str);
////第四步存到数据库中
var query1 = from sg in context.SendSignal
where sg.Signal_Name == SignalName && sg.ID == MessageIDInt
select sg;
foreach (var item in query1)
{
item.Signal_Value = str;
}
context.SubmitChanges();
this.Close();
}
