有时候需要C#与Python交互或者执行python写的算法，这个时候我们可以在C#中调用执行python文件形式进行交互，下面是我写的C#执行Python代码的工具类，可以直接拿来使用，需要引用IronPython.dll。
/*
* 功能:Python与C#交互
* QQ:1406981715
* 创建日期:2017-03-03
*/
public class HPythonHelper
{
/// <summary>
/// 执行Python代码(传递0个或1个参数)
/// </summary>
/// <param name="value">Python代码或者Python代码文件名</param>
/// <param name="pKey">参数名,为null表示无参数</param>
/// <param name="pVal">参数值</param>
/// <param name="searchPaths">搜索路径列表(引用第三方库时需要加入相应的路径)</param>
/// <param name="IsFileName">IsFileName=true,则value为Python代码文件名,否则为Python代码</param>
/// <returns></returns>
public static object RunCode(string value,string pKey=null,string pVal=null,
List<string> searchPaths=null,bool IsFileName=true)
{
Dictionary<string,object> parameters = null;
if (!string.IsNullOrEmpty(pKey))
{
parameters = new Dictionary<string, object>();
parameters[pKey] = pVal;
}
return RunCode(value, parameters, searchPaths, IsFileName);
}
/// <summary>
/// 执行Python代码
/// </summary>
/// <param name="value">Python代码或者Python代码文件名</param>
/// <param name="parameters">参数,键表示参数名,为null表示无参数</param>
/// <param name="searchPaths">搜索路径列表(引用第三方库时需要加入相应的路径)</param>
/// <param name="IsFileName">IsFileName=true,则value为Python代码文件名,否则为Python代码</param>
/// <returns></returns>
public static object RunCode(string value, Dictionary<string, object> parameters,
List<string> searchPaths = null, bool IsFileName = true)
{
ScriptEngine engine = null;
try
{
engine = Python.CreateEngine();
if (searchPaths != null && searchPaths.Count > 0)
{
ICollection<string> paths = engine.GetSearchPaths();
foreach (string item in searchPaths)
{
paths.Add(item);
}
engine.SetSearchPaths(paths);
}
ScriptScope scope = engine.CreateScope();
if (parameters != null && parameters.Count > 0)
{
foreach (KeyValuePair<string,object> kvp in parameters)
{
scope.SetVariable(kvp.Key,kvp.Value);
}
}
ScriptSource source = IsFileName ? engine.CreateScriptSourceFromFile(value)
: engine.CreateScriptSourceFromString(value);
return source.Execute(scope);
}
catch (Exception ex)
{
if (engine != null)
{
ExceptionOperations exop = engine.GetService<ExceptionOperations>();
throw new Exception(string.Format("Error:{0}", exop.FormatException(ex)));
}
else
{
throw;
}
}
}
/// <summary>
/// 获取Python中指定的函数名的句柄
/// </summary>
/// <typeparam name="T">函数类型</typeparam>
/// <param name="value">Python代码或者Python代码文件名</param>
/// <param name="functionName">函数名</param>
/// <param name="searchPaths">搜索路径列表(引用第三方库时需要加入相应的路径)</param>
/// <param name="IsFileName">IsFileName=true,则value为Python代码文件名,否则为Python代码</param>
/// <returns>注:对于无返回值的函数则此处返回null</returns>
public static T GetFunctionHandle<T>(string value,string functionName,
List<string> searchPaths = null, bool IsFileName = true)
{
ScriptEngine engine = null;
try
{
engine = Python.CreateEngine();
if (searchPaths != null && searchPaths.Count > 0)
{
ICollection<string> paths = engine.GetSearchPaths();
foreach (string item in searchPaths)
{
paths.Add(item);
}
engine.SetSearchPaths(paths);
}
//ScriptRuntime runTime = Python.CreateRuntime();
ScriptScope scope = engine.CreateScope();
ScriptSource source = IsFileName ? engine.CreateScriptSourceFromFile(value)
: engine.CreateScriptSourceFromString(value);
source.Execute(scope);
return scope.GetVariable<T>(functionName);
}
catch (Exception ex)
{
if (engine != null)
{
ExceptionOperations exop = engine.GetService<ExceptionOperations>();
throw new Exception(string.Format("Error:{0}", exop.FormatException(ex)));
}
else
{
throw;
}
}
}
/// <summary>
/// 执行指定的函数
/// </summary>
/// <param name="value">Python代码或者Python代码文件名</param>
/// <param name="functionName">函数名</param>
/// <param name="parameters">函数参数,必须按照函数形参定义顺序列出参数值</param>
/// <param name="searchPaths">搜索路径列表(引用第三方库时需要加入相应的路径)</param>
/// <param name="IsFileName">IsFileName=true,则value为Python代码文件名,否则为Python代码</param>
/// <returns>注:对于无返回值的函数则此处返回null</returns>
public static object RunFunction(string value,string functionName,List<object> parameters=null,
List<string> searchPaths = null, bool IsFileName = true)
{
if (parameters == null || parameters.Count == 0)
{
var fun = GetFunctionHandle<Func<object>>(value, functionName, searchPaths, IsFileName);
return fun();
}
else if (parameters.Count ==1 )
{
var fun = GetFunctionHandle<Func<object, object>>(value, functionName, searchPaths, IsFileName);
return fun(parameters[0]);
}
else if (parameters.Count == 2)
{
var fun = GetFunctionHandle<Func<object, object, object>>(value, functionName,
searchPaths, IsFileName);
return fun(parameters[0], parameters[1]);
}
else if (parameters.Count == 3)
{
var fun = GetFunctionHandle<Func<object, object, object, object>>(value, functionName,
searchPaths, IsFileName);
return fun(parameters[0], parameters[1], parameters[2]);
}
else if (parameters.Count == 4)
{
var fun = GetFunctionHandle<Func<object, object, object, object, object>>(value, functionName,
searchPaths, IsFileName);
return fun(parameters[0], parameters[1], parameters[2], parameters[3]);
}
else if (parameters.Count == 5)
{
var fun = GetFunctionHandle<Func<object, object, object, object, object, object>>(value, functionName,
searchPaths, IsFileName);
return fun(parameters[0], parameters[1], parameters[2], parameters[3], parameters[4]);
}
else
{
throw new ArgumentException("参数个数不可超过5个!");
}
}
}
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