C#泛型实例化

Question

全部,我有一个返回List的方法.此方法用于根据名称返回SQL StoredProcedures,Views和Functions的参数.我想要做的是创建一个对象列表并将此列表返回给调用者.方法如下

private List<T> GetInputParameters<T>(string spFunViewName)
{
    string strSql = String.Format(
        "SELECT PARAMETER_NAME, DATA_TYPE FROM INFORMATION_SCHEMA.PARAMETERS " +
        "WHERE SPECIFIC_NAME = '{0}' AND PARAMETER_MODE = 'IN';",
        spFunViewName);
    List<string[]> paramInfoList = new List<string[]>();
    DataTable paramDt = Utilities.DTFromDB(conn, "InputParmaters", strSql);
    if (paramDt != null)
    {
        Converter<DataRow, string[]> rowConverter =
            new Converter<DataRow, string[]>(Utilities.RowColConvert);
        paramInfoList = Utilities.ConvertRowsToList<string[]>(paramDt, rowConverter);
    }
    else
        return null;

    // Build the input parameter list.
    List<T> paramList = new List<T>();
    foreach (string[] paramInfo in paramInfoList)
    {
        T t = new T(paramInfo[NAME], paramInfo[TYPE], Convert.ToInt32(paramInfo[CHARMAXLEN]));
        columnList.Add(column);
    }
    return columnList;   
}

我显然无法实例化Tvia new并传递给构造函数,但应该清楚我正在尝试做什么.有没有办法用另外三种方法做我想做的事情？

注意.主要问题是我传递给T的参数数量可以是两个或三个.

谢谢你的时间.

编辑:struct我使用的是如下

public struct Database
{
    public string name { get; set; }
    public string filename { get; set; }
    public List<Table> tables { get; set; }
    public List<StoredProcedure> sps { get; set; }
    public List<Function> funcs { get; set; }
    public List<View> views { get; set; }
    public Database(string name, string filename)
    {
        this.name = name;
        this.filename = filename;
    }
}

protected internal struct StoredProcedure
{
    public string name { get; set; }
    public List<string[]> parameters { get; set; }
    public StoredProcedure(string name, List<string[]> parameters)
    {
        this.name = name;
        this.parameters = parameters;
    }
}

protected internal struct Function
{
    public string name { get; set; }
    public string output { get; set; }
    public List<string[]> parameters { get; set; }
    public Function(string name, string output, List<string[]> parameters)
    {
        this.name = name;
        this.output = output;
        this.parameters = parameters;
    }
}

protected internal struct View
{
    public string name {get; set;} 
    public List<string[]> parameters { get; set; }
    public View(string name, List<string[]> parameters)
    {
        this.name = name;
        this.parameters = parameters;
    }
}

Answer 1

使用Activator该类创建T并传递参数.

Type type = typeof(T);
var result = (T)Activator.CreateInstance(type, new object[] { yourParameters });

在您的代码段中使用:

T t = Activator.CreateInstance(type, colInfo[NAME], colInfo[TYPE], Convert.ToInt32(colInfo[CHARMAXLEN]));