如何在C＃中动态创建类和List，例如：如果我们将数据集传递给应返回List格式化数据的方法
但是在传统模型上每当我需要创建类和方法时，任何有想法的人都会分享它。
这是我的传统方法代码： -
[WebMethod]
public static List<ICF> ge_Grid_data(string paramstr, string procname)
{
#region
List<ICF> lst = new List<ICF>();
try
{
string[] parameters = paramstr.Split('~');
string err = string.Empty;
int len = parameters.Length;
SqlParameter[] sqlParam = new SqlParameter[len];
for (int i = 0; i < len; i++)
{
string[] paramWithValue = parameters[i].Split('$');
string param = paramWithValue[0].ToString();
string value = paramWithValue[1].ToString();
sqlParam[i] = new SqlParameter { ParameterName = param, Value = value };
}
DataSet ds = new clsiCMSBLBase().GetListData(ref err, sqlParam, procname);
DataTable dt = ds.Tables[0];
foreach (DataRow dr in dt.Rows)
{
ICF obj = new ICF();
obj.Flag = Convert.ToInt32(dr["Flag"]);
obj.ClaimID = dr["ClaimID"].ToString();
obj.RyotNumber = dr["RyotNumber"].ToString();
obj.SeasonCode = dr["SeasonCode"].ToString();
obj.PlotNumber = dr["PlotNumber"].ToString();
obj.RyotNumber = dr["RyotNumber"].ToString();
obj.RyotName = dr["RyotName"].ToString();
obj.ClaimDate = dr["ClaimDate"].ToString();
obj.ClaimFormNo = dr["ClaimFormNo"].ToString();
obj.ClaimArea = dr["ClaimArea"].ToString();
obj.ClaimAmount = dr["ClaimAmount"].ToString();
obj.ClaimReason = dr["ClaimReason"].ToString();
obj.SurveyorID = dr["SurveyorID"].ToString();
obj.SurveyorDate = dr["SurveyorDate"].ToString();
obj.InsuranceAmount = dr["InsuranceAmount"].ToString();
lst.Add(obj);
}
}
catch (Exception ex)
{
}
return lst;
#endregion
}
这是ICF课程： -
public class ICF
{
#region
public int Flag { get; set; }
public string ClaimID { get; set; }
public string SeasonCode { get; set; }
public string PlotNumber { get; set; }
public string RyotNumber { get; set; }
public string RyotName { get; set; }
public string ClaimDate { get; set; }
public string ClaimFormNo { get; set; }
public string ClaimArea { get; set; }
public string ClaimAmount { get; set; }
public string ClaimReason { get; set; }
public string SurveyorID { get; set; }
public string SurveyorDate { get; set; }
public string InsuranceAmount { get; set; }
#endregion
}
我的期望：
public static class Extensions
{
/// <summary>
/// Converts datatable to list<T> dynamically
/// </summary>
/// <typeparam name="T">Class name</typeparam>
/// <param name="dataTable">data table to convert</param>
/// <returns>List<T></returns>
public static List<T> ToList<T>(this DataTable dataTable) where T : new()
{
var dataList = new List<T>();
//Define what attributes to be read from the class
const BindingFlags flags = BindingFlags.Public | BindingFlags.Instance;
//Read Attribute Names and Types
var objFieldNames = typeof(T).GetProperties(flags).Cast<PropertyInfo>().
Select(item => new
{
Name = item.Name,
Type = Nullable.GetUnderlyingType(item.PropertyType) ?? item.PropertyType
}).ToList();
//Read Datatable column names and types
var dtlFieldNames = dataTable.Columns.Cast<DataColumn>().
Select(item => new {
Name = item.ColumnName,
Type=item.DataType
}).ToList();
foreach (DataRow dataRow in dataTable.AsEnumerable().ToList())
{
var classObj = new T();
foreach (var dtField in dtlFieldNames)
{
PropertyInfo propertyInfos = classObj.GetType().GetProperty(dtField.Name);
var field = objFieldNames.Find(x => x.Name == dtField.Name);
if (field != null)
{
if (propertyInfos.PropertyType == typeof(DateTime))
{
propertyInfos.SetValue
(classObj, convertToDateTime(dataRow[dtField.Name]), null);
}
else if (propertyInfos.PropertyType == typeof(int))
{
propertyInfos.SetValue
(classObj, ConvertToInt(dataRow[dtField.Name]), null);
}
else if (propertyInfos.PropertyType == typeof(long))
{
propertyInfos.SetValue
(classObj, ConvertToLong(dataRow[dtField.Name]), null);
}
else if (propertyInfos.PropertyType == typeof(decimal))
{
propertyInfos.SetValue
(classObj, ConvertToDecimal(dataRow[dtField.Name]), null);
}
else if (propertyInfos.PropertyType == typeof(String))
{
if (dataRow[dtField.Name].GetType() == typeof(DateTime))
{
propertyInfos.SetValue
(classObj, ConvertToDateString(dataRow[dtField.Name]), null);
}
else
{
propertyInfos.SetValue
(classObj, ConvertToString(dataRow[dtField.Name]), null);
}
}
}
}
dataList.Add(classObj);
}
return dataList;
}
private static string ConvertToDateString(object date)
{
if (date == null)
return string.Empty;
return SpecialDateTime.ConvertDate(Convert.ToDateTime(date));
}
private static string ConvertToString(object value)
{
return Convert.ToString(HelperFunctions.ReturnEmptyIfNull(value));
}
private static int ConvertToInt(object value)
{
return Convert.ToInt32(HelperFunctions.ReturnZeroIfNull(value));
}
private static long ConvertToLong(object value)
{
return Convert.ToInt64(HelperFunctions.ReturnZeroIfNull(value));
}
private static decimal ConvertToDecimal(object value)
{
return Convert.ToDecimal(HelperFunctions.ReturnZeroIfNull(value));
}
private static DateTime convertToDateTime(object date)
{
return Convert.ToDateTime(HelperFunctions.ReturnDateTimeMinIfNull(date));
}
}
最后，我需要这样称呼它：
List<MyClass> list = dt.ToList<MyClass>
但此代码无效
答案 0 :(得分：0)
虽然您不太清楚自己想要实现的目标，但您可以使用dynamic关键字和System.Dynamic.ExpandoObject与.Net＆gt; = 4来完成您所描述的内容
答案 1 :(得分：0)
在ICF类中创建一个方法
public class ICF
{
public static List<ICF> icfList = new List<ICF>();
#region
public int Flag { get; set; }
public string ClaimID { get; set; }
public string SeasonCode { get; set; }
public string PlotNumber { get; set; }
public string RyotNumber { get; set; }
public string RyotName { get; set; }
public string ClaimDate { get; set; }
public string ClaimFormNo { get; set; }
public string ClaimArea { get; set; }
public string ClaimAmount { get; set; }
public string ClaimReason { get; set; }
public string SurveyorID { get; set; }
public string SurveyorDate { get; set; }
public string InsuranceAmount { get; set; }
#endregion
public static void AddRow(DataRow dr)
{
ICF obj = new ICF();
obj.Flag = Convert.ToInt32(dr["Flag"]);
obj.ClaimID = dr["ClaimID"].ToString();
obj.RyotNumber = dr["RyotNumber"].ToString();
obj.SeasonCode = dr["SeasonCode"].ToString();
obj.PlotNumber = dr["PlotNumber"].ToString();
obj.RyotNumber = dr["RyotNumber"].ToString();
obj.RyotName = dr["RyotName"].ToString();
obj.ClaimDate = dr["ClaimDate"].ToString();
obj.ClaimFormNo = dr["ClaimFormNo"].ToString();
obj.ClaimArea = dr["ClaimArea"].ToString();
obj.ClaimAmount = dr["ClaimAmount"].ToString();
obj.ClaimReason = dr["ClaimReason"].ToString();
obj.SurveyorID = dr["SurveyorID"].ToString();
obj.SurveyorDate = dr["SurveyorDate"].ToString();
obj.InsuranceAmount = dr["InsuranceAmount"].ToString();
icfList.Add(obj);
}
}
答案 2 :(得分：0)
**
我得到了答案这是序列化数据，易于在HTML页面中访问 使用Jquery Ajax方法，这是可重用的代码，就像常用方法一样 只传递SP名称，参数，表顺序（第0表或第1表 无论您的愿望如何），此模型可用于填充数据到控件或jqx小部件网格绑定..等等
**
[WebMethod]
public static String GetRowData_Tables(string procedureName, string paramstr, int table)
{
string[] parameters = paramstr.Split('~');
string err = string.Empty;
int len = parameters.Length;
SqlParameter[] sqlParam = new SqlParameter[len];
for (int i = 0; i < len; i++)
{
string[] paramWithValue = parameters[i].Split('$');
string param = paramWithValue[0].ToString();
string value = paramWithValue[1].ToString();
sqlParam[i] = new SqlParameter { ParameterName = param, Value = value };
}
try
{
DataSet ds = new clsiCMSBLBase().GetListData(ref err, sqlParam, procedureName);
String JSONString = String.Empty;
//JSONString = Newtonsoft.Json.JsonConvert.SerializeObject(ds, Newtonsoft.Json.Formatting.Indented);
if (ds.Tables[table].Rows.Count > 0)
{
DataTable dt = ds.Tables[table];
JSONString = Newtonsoft.Json.JsonConvert.SerializeObject(dt, Newtonsoft.Json.Formatting.Indented);
}
return JSONString;
}
catch (Exception)
{
return "Error";
}
}