本篇內(nèi)容介紹了“C#怎么將LINQ數(shù)據(jù)集轉(zhuǎn)換為Datatable”的有關(guān)知識(shí),在實(shí)際案例的操作過(guò)程中,不少人都會(huì)遇到這樣的困境,接下來(lái)就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!
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1.方法一:(測(cè)試可用)
//通過(guò)一個(gè)公共類將LINQ數(shù)據(jù)集轉(zhuǎn)換為datatable
public DataTable LINQToDataTable<T>(IEnumerable<T> varlist)
{
DataTable dtReturn = new DataTable();
// column names
PropertyInfo[] oProps = null;
if (varlist == null) return dtReturn;
foreach (T rec in varlist)
{
// Use reflection to get property names, to create table, Only first time, others
will follow
if (oProps == null)
{
oProps = ((Type)rec.GetType()).GetProperties();
foreach (PropertyInfo pi in oProps)
{
Type colType = pi.PropertyType;
if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition()
==typeof(Nullable<>)))
{
colType = colType.GetGenericArguments()[0];
}
dtReturn.Columns.Add(new DataColumn(pi.Name, colType));
}
}
DataRow dr = dtReturn.NewRow();
foreach (PropertyInfo pi in oProps)
{
dr[pi.Name] = pi.GetValue(rec, null) == null ?DBNull.Value :pi.GetValue
(rec,null);
}
dtReturn.Rows.Add(dr);
}
return dtReturn;
}
調(diào)用:
var vrCountry = from country in objEmpDataContext.CountryMaster
select new {country.CountryID,country.CountryName};
DataTable dt = LINQToDataTable(vrCountry);
2.方法二:(未測(cè)試)
public DataTable ToDataTable(System.Data.Linq.DataContext ctx, object query)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
IDbCommand cmd = ctx.GetCommand(query as IQueryable);
SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = (SqlCommand)cmd;
DataTable dt = new DataTable("sd");
try
{
cmd.Connection.Open();
adapter.FillSchema(dt, SchemaType.Source);
adapter.Fill(dt);
}
finally
{
cmd.Connection.Close();
}
return dt;
}
調(diào)用:
var vrCountry = from country in objEmpDataContext.CountryMaster
select new {country.CountryID,country.CountryName};
DataTable dt = LINQToDataTable(objEmpDataContext,vrCountry);
“C#怎么將LINQ數(shù)據(jù)集轉(zhuǎn)換為Datatable”的內(nèi)容就介紹到這里了,感謝大家的閱讀。如果想了解更多行業(yè)相關(guān)的知識(shí)可以關(guān)注創(chuàng)新互聯(lián)網(wǎng)站,小編將為大家輸出更多高質(zhì)量的實(shí)用文章!
本文題目:C#怎么將LINQ數(shù)據(jù)集轉(zhuǎn)換為Datatable
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