/// <summary>
/// 将文本转化为物理量
/// </summary>
/// <param name="text">代表物理量的文本</param>
/// <returns>转化后的物理量</returns>
public static PhysicalVariable Text2Value(string text)
{
bool successed;
PhysicalVariable rtn = Text2Value(text, out successed);
return(rtn);
}
/// <summary>
/// 将数值转换自动转换为SI词头的有效位数表示方式
/// </summary>
/// <param name="value">需要转换的物理量</param>
/// <returns>带有SI词头的有效位数表示方式文本</returns>
/// <param name="percentage">百分号显示</param>
/// <param name="positiveSign">正值显示+号</param>
/// <returns>带有SI词头的有效位数表示方式文本</returns>
public static string Value2Text(PhysicalVariable value, bool percentage = false, bool positiveSign = false, bool usePrefix = true)
{
if (value.EffectiveLength > 0)
{
return(Value2Text(value, (int)value.EffectiveLength, DefaultConstant.NoiseLevel(value.PhysicalVariableType), percentage, positiveSign, usePrefix));
}
else
{
return(Value2Text(value, DefaultConstant.EffectiveLength(value.PhysicalVariableType), DefaultConstant.NoiseLevel(value.PhysicalVariableType), percentage, positiveSign, usePrefix));
}
}
/// <summary>
/// 将数值转换自动转换为SI词头的有效位数表示方式
/// </summary>
/// <param name="value">需要转换的物理量</param>
/// <param name="effectiveLength">有效位数长度（必须是正整数）</param>
/// <param name="noiseLevel">物理量底噪电平</param>
/// <param name="percentage">百分号显示</param>
/// <param name="positiveSign">正值显示+号</param>
/// <returns>带有SI词头的有效位数表示方式文本</returns>
public static string Value2Text(PhysicalVariable value, int effectiveLength, int noiseLevel, bool percentage = false, bool positiveSign = false, bool usePrefix = true)
{
if (value == null)
{
return(string.Empty);
}
if (value.value != null)
{
return(Value2Text((double)value.value, effectiveLength, noiseLevel, string.Empty, value.PhysicalVariableType, percentage, positiveSign, usePrefix));
}
else
{
return(value.OriginText);
}
}
/// <summary>
/// 将文本转化为物理量
/// </summary>
/// <param name="text">代表物理量的文本</param>
/// <param name="successed">是否转换成功</param>
/// <returns>转化后的物理量（当successed = true时有效）</returns>
public static PhysicalVariable Text2Value(string text, out bool successed)
{
PhysicalVariable rtn = new PhysicalVariable();
string num = string.Empty;
string suffix = string.Empty;
int i = 0;
foreach (char c in text)
{
if (c != ' ')
{
if (c != '?')
{
if (c != '\0')
{
if (c != ';')
{
num += c;
}
}
}
}
}
rtn.OriginText = num;
if (text.Length < 1)
{
successed = false;
return(rtn);
}
if (num.StartsWith("+"))
{
num = num.Remove(0, 1);
}
while ((num.Length > 0) && (!Microsoft.VisualBasic.Information.IsNumeric(num)))
{
suffix = num[num.Length - 1] + suffix;
num = num.Remove(num.Length - 1, 1);
}
if (num == string.Empty)
{
successed = false;
rtn.PhysicalVariableType = QuantityName.None;
return(rtn);
}
suffix = suffix.Trim();
Symbol symbol = QuantitiesConverter.String2Symbol(suffix);
switch (symbol)
{
case Symbol.None:
break;
case Symbol.VAR:
suffix = suffix.Remove(suffix.Length - 3);
break;
case Symbol.Hz:
case Symbol.VA:
suffix = suffix.Remove(suffix.Length - 2);
break;
default:
suffix = suffix.Remove(suffix.Length - 1);
break;
}
bool percentage = suffix.StartsWith("%");
if (percentage)
{
suffix = suffix.Remove(0, 1);
}
if (PrefixsConverter.isPrefix(suffix) == false)
{
successed = false;
rtn.PhysicalVariableType = QuantityName.None;
return(rtn);
}
rtn.value = double.Parse(num);
rtn.value *= Math.Pow(10, PrefixsConverter.prefixString2dec(suffix));
if (percentage)
{
rtn.value /= 100.0;
}
rtn.EffectiveLength = 0;
i = 0;
bool notZero = false;
while (i < num.Length)
{
if (num[i] == '.')
{
i++;
}
if (i >= num.Length)
{
successed = false;
rtn.PhysicalVariableType = QuantityName.None;
return(rtn);
}
if (num[i] == '0')
{
if (notZero)
{
rtn.EffectiveLength++;
i++;
}
else
{
i++;
}
}
else if ((num[i] >= '1') && (num[i] <= '9'))
{
notZero = true;
rtn.EffectiveLength++;
i++;
}
else
{
i = num.Length;
}
}
rtn.PhysicalVariableType = (QuantityName)symbol;
successed = true;
return(rtn);
}
/// <summary>
/// 将数值转换自动转换为SI词头的有效位数表示方式
/// </summary>
/// <param name="value">需要转换的物理量</param>
/// <param name="effectiveLength">有效位数长度（必须是正整数）</param>
/// <param name="percentage">百分号显示</param>
/// <param name="positiveSign">正值显示+号</param>
/// <returns>带有SI词头的有效位数表示方式文本</returns>
public static string Value2Text(PhysicalVariable value, int effectiveLength, bool percentage = false, bool positiveSign = false)
{
return(Value2Text(value, effectiveLength, DefaultConstant.NoiseLevel(value.PhysicalVariableType), percentage, positiveSign));
}