how to get parameter name in c#?

Question

        public string BuildParameter(object[] para)
        {
            var parameters = "";

            for (var i = 0; i < para.Length; i++)
            {
                if (para[i]  != null)
                {
                    parameters += "&" + nameof(para[i]) + "=" + para[i];
                }
            }
return parameters
}

but I can not use nameof(para[i]);

I do not know how many parameters I will concat so I use parameter object[] para

I may call this function like : `string parameter=BuildParameter(new object[]{PageIndex,Filter});

public int PageIndex{get;set;} public string Filter{get;set;}`

Answer 1

Hi @打玻璃,

I suggest you using dynamic instead of object[]. Here is a whole working demo you could follow:

public string BuildParameter(dynamic para)
{
    var parameters = "";
    IDictionary<string, object> propertyValues = (IDictionary<string, object>)para;
    foreach(var item in propertyValues)
    {
        if(item.Value!=null)
        {
            parameters+= "&" + item.Key + "=" + item.Value;
        }
    }
    return parameters;
}

You can call this function like:

dynamic s = new ExpandoObject();  
s.PageIndex = 1;  
s.Filter = "aa";
string parameter = BuildParameter(s);

If there has any problem, please let me know freely.

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Rena