[英]how to DataTable split into mutiple datatables c#
Gender Age Category
--------------------------------
Male | 10 | 2
Female | 15 | 1
Trans | 13 | 3
Female | 10 | 1
Male | 20 | 2
i have a datatable with above values. 我有一个具有上述值的数据表。 Male CategoryId is 2. in above table there are total 2 Males rows. 男性CategoryId为2。在上表中,共有2男性行。 based on Category, merged two rows and divide into a seperate datatable. 基于类别,合并两行并分成一个单独的数据表。
My required output is :- 我需要的输出是:
Datatable 1 数据表1
Gender Age Category
--------------------------------
Male | 10 | 2
Male | 20 | 2
DataTable 2 数据表2
Gender Age Category
--------------------------------
Female | 15 | 1
Female | 10 | 1
DataTable 3 数据表3
Gender Age Category
--------------------------------
Trans | 13 | 3
var view = sourceDataTable.DefaultView;
view.RowFilter = "Category = 2";
var maleDataTable = view.ToTable();
view.RowFilter = "Category = 1";
var femaleDataTable = view.ToTable();
view.RowFilter = "Category = 3";
var transDataTable = view.ToTable();
Here you go: 干得好:
List<DataTable> result = DTHead.AsEnumerable()
.GroupBy(row => row.Field<DataType>("Category"))
.Select(g => g.CopyToDataTable())
.ToList();
For more details please check this post: Split Tables 有关更多详细信息,请检查此帖子: 拆分表
See following : 请参阅以下内容:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication48
{
class Program
{
static void Main(string[] args)
{
DataTable dt = new DataTable();
dt.Columns.Add("Gender", typeof(string));
dt.Columns.Add("Age", typeof(int));
dt.Columns.Add("Category", typeof(int));
dt.Rows.Add(new object[] {"Male", 10, 2});
dt.Rows.Add(new object[] {"Female", 15, 1});
dt.Rows.Add(new object[] {"Trans", 13, 3});
dt.Rows.Add(new object[] {"Female", 10, 1});
dt.Rows.Add(new object[] {"Male", 20, 2});
DataTable dt1 = dt.AsEnumerable().Where(x => x.Field<string>("Gender") == "Male").CopyToDataTable();
DataTable dt2 = dt.AsEnumerable().Where(x => x.Field<string>("Gender") == "Feale").CopyToDataTable();
DataTable dt3 = dt.AsEnumerable().Where(x => x.Field<string>("Gender") == "Trans").CopyToDataTable();
}
}
}
Here is a more generic solution that get every type in a column : 这是一种更通用的解决方案,可将每种类型都归入一列:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication48
{
class Program
{
static void Main(string[] args)
{
DataTable dt = new DataTable();
dt.Columns.Add("Gender", typeof(string));
dt.Columns.Add("Age", typeof(int));
dt.Columns.Add("Category", typeof(int));
dt.Rows.Add(new object[] { "Male", 10, 2 });
dt.Rows.Add(new object[] { "Female", 15, 1 });
dt.Rows.Add(new object[] { "Trans", 13, 3 });
dt.Rows.Add(new object[] { "Female", 10, 1 });
dt.Rows.Add(new object[] { "Male", 20, 2 });
//updated code
string[] rowNames = dt.AsEnumerable().Select(x => x.Field<string>("Gender")).Distinct().ToArray();
DataSet ds = new DataSet();
foreach (string gender in rowNames)
{
DataTable newDt = dt.AsEnumerable().Where(x => x.Field<string>("Gender") == gender).CopyToDataTable();
newDt.TableName = gender;
ds.Tables.Add(newDt);
}
}
}
}
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