public void MethodCallExpressionParse(MethodCallExpression methodCallExpression)
{
var methodName = methodCallExpression.Method.Name;
var methodCallObject = methodCallExpression.Object;
//判断是常数调用方法，还是变量调用方法
if (methodCallExpression.Method.DeclaringType == typeof(string))
{
var conventionMethodNameList = new List <string>()
{
"Trim", "TrimEnd", "TrimStart", "ToUpper", "ToLower"
};
if (conventionMethodNameList.Contains(methodName))
{
//转换后的方法名称
var afterConventionMethodName = "";
switch (methodCallExpression.Method.Name)
{
case "Trim":
afterConventionMethodName = "TRIM";
break;
case "TrimEnd":
afterConventionMethodName = "RTRIM";
break;
case "TrimStart":
afterConventionMethodName = "LTRIM";
break;
case "ToUpper":
afterConventionMethodName = "UPPER";
break;
case "ToLower":
afterConventionMethodName = "*";
break;
}
sqlInfo.AddSql(afterConventionMethodName + "(");
HandleExpressionByRecursion(methodCallObject);
sqlInfo.AddSql(")");
}
var likeMethodNameList = new List <string>()
{
"Contains", "StartsWith", "EndsWith"
};
if (likeMethodNameList.Contains(methodName))
{
var value = "";
var argOne = methodCallExpression.Arguments[0];
switch (methodName)
{
case "Contains":
value = "%" + GetValue(argOne).ToString() + "%";
break;
case "StartsWith":
value = "" + GetValue(argOne).ToString() + "%";
break;
case "EndsWith":
value = "%" + GetValue(argOne).ToString();
break;
}
HandleExpressionByRecursion(methodCallObject);
sqlInfo.AddSql("like ");
sqlInfo.AddParameter(value);
}
if (methodName == "Equals")
{
var argOne = methodCallExpression.Arguments[0];
HandleExpressionByRecursion(methodCallObject);
sqlInfo.AddSql("= ");
HandleExpressionByRecursion(argOne);
}
}
//throw new Exception("Unsupported method call: " + expression.Method.Name);
}