Mixing
How to load data from SQL to datetable that show in treeview
-1
I have a chartTable with 2 columns:
ChildPersonID | ParentPersonID
--------------+-----------------
1 | 2
1 | 3
2 | 4
That is joined to personTable with 2 columns:
ID | PersonName
---+-----------------
1 | a
2 | b
3 | c
4 | d
I want a select query that fill datatable with PersonName that show in treeview
Result:
parentname | parentid | childname | childid
-----------+----------+-----------+---------
a | 1 | b | 2
a | 1 | c | 3
b | 2 | d | 4
c# sql
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
add a comment |
-1
I have a chartTable with 2 columns:
ChildPersonID | ParentPersonID
--------------+-----------------
1 | 2
1 | 3
2 | 4
That is joined to personTable with 2 columns:
ID | PersonName
---+-----------------
1 | a
2 | b
3 | c
4 | d
I want a select query that fill datatable with PersonName that show in treeview
Result:
parentname | parentid | childname | childid
-----------+----------+-----------+---------
a | 1 | b | 2
a | 1 | c | 3
b | 2 | d | 4
c# sql
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
2
Did you try writing any code for this? What issue you are facing in that?
– Chetan Ranpariya
Jan 2 at 10:15
1
Join twice! One time for parentname and one time for childname.
– jarlh
Jan 2 at 10:16
add a comment |
-1
-1
-1
I have a chartTable with 2 columns:
ChildPersonID | ParentPersonID
--------------+-----------------
1 | 2
1 | 3
2 | 4
That is joined to personTable with 2 columns:
ID | PersonName
---+-----------------
1 | a
2 | b
3 | c
4 | d
I want a select query that fill datatable with PersonName that show in treeview
Result:
parentname | parentid | childname | childid
-----------+----------+-----------+---------
a | 1 | b | 2
a | 1 | c | 3
b | 2 | d | 4
c# sql
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
I have a chartTable with 2 columns:
ChildPersonID | ParentPersonID
--------------+-----------------
1 | 2
1 | 3
2 | 4
That is joined to personTable with 2 columns:
ID | PersonName
---+-----------------
1 | a
2 | b
3 | c
4 | d
I want a select query that fill datatable with PersonName that show in treeview
Result:
parentname | parentid | childname | childid
-----------+----------+-----------+---------
a | 1 | b | 2
a | 1 | c | 3
b | 2 | d | 4
c# sql
c# sql
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
edited Jan 2 at 10:34
xxxsenatorxxx
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
asked Jan 2 at 10:12
xxxsenatorxxxxxxsenatorxxx
629
629
2
Did you try writing any code for this? What issue you are facing in that?
– Chetan Ranpariya
Jan 2 at 10:15
1
Join twice! One time for parentname and one time for childname.
– jarlh
Jan 2 at 10:16
add a comment |
2
Did you try writing any code for this? What issue you are facing in that?
– Chetan Ranpariya
Jan 2 at 10:15
1
Join twice! One time for parentname and one time for childname.
– jarlh
Jan 2 at 10:16
2
2
Did you try writing any code for this? What issue you are facing in that?
– Chetan Ranpariya
Jan 2 at 10:15
Did you try writing any code for this? What issue you are facing in that?
– Chetan Ranpariya
Jan 2 at 10:15
1
1
Join twice! One time for parentname and one time for childname.
– jarlh
Jan 2 at 10:16
Join twice! One time for parentname and one time for childname.
– jarlh
Jan 2 at 10:16
add a comment |
2 Answers
2
active
oldest
votes
1
This is the query which you are looking for (though the column name which you have mentioned are confusing, I think it should be reversed)
DECLARE @Table1 TABLE (ChildPersonID INT,ParentPersonID INT)
DECLARE @Table2 TABLE (ID INT, PersonName VARCHAR(10))
INSERT INTO @Table1 VALUES (1,2),(1,3),(2,4)
INSERT INTO @Table2 VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d')
SELECT T3.PersonName AS parentName, T1.ChildPersonID AS ParentId,
T2.PersonName AS childname, T1.ParentPersonID AS childid
FROM @Table1 T1
INNER JOIN @Table2 T2 ON T1.ParentPersonID = T2.Id
INNER JOIN @Table2 T3 ON T1.ChildPersonID = T3.id
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
add a comment |
1
See code below :
using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication94
{
class Program
{
static void Main(string args)
{
DataTable dt = new DataTable();
dt.Columns.Add("parentname", typeof(string));
dt.Columns.Add("parentid", typeof(int));
dt.Columns.Add("childname", typeof(string));
dt.Columns.Add("childid", typeof(int));
DataTable dtChildPerson = new DataTable();
dtChildPerson.Columns.Add("ChildPersonID", typeof(int));
dtChildPerson.Columns.Add("ParentPersonID", typeof(int));
dtChildPerson.Rows.Add(new object { 1, 1 });
dtChildPerson.Rows.Add(new object { 1, 3 });
dtChildPerson.Rows.Add(new object { 2, 4 });
DataTable personName = new DataTable();
personName.Columns.Add("ID", typeof(int));
personName.Columns.Add("PersonName", typeof(string));
personName.Rows.Add(new object { 1, "a" });
personName.Rows.Add(new object { 2, "b" });
personName.Rows.Add(new object { 3, "c" });
personName.Rows.Add(new object { 4, "d" });
foreach (DataRow row in dtChildPerson.AsEnumerable())
{
int parentID = row.Field<int>("ParentPersonID");
string parentName = personName.AsEnumerable().Where(x => x.Field<int>("ID") == parentID).Select(x => x.Field<string>("PersonName")).FirstOrDefault();
int childID = row.Field<int>("ChildPersonID");
foreach(DataRow childRow in personName.AsEnumerable().Where(x => x.Field<int>("ID") == childID))
{
string childName = childRow.Field<string>("PersonName");
dt.Rows.Add(new object { parentName, parentID, childName, childID });
}
}
}
}
}
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
This is the query which you are looking for (though the column name which you have mentioned are confusing, I think it should be reversed)
DECLARE @Table1 TABLE (ChildPersonID INT,ParentPersonID INT)
DECLARE @Table2 TABLE (ID INT, PersonName VARCHAR(10))
INSERT INTO @Table1 VALUES (1,2),(1,3),(2,4)
INSERT INTO @Table2 VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d')
SELECT T3.PersonName AS parentName, T1.ChildPersonID AS ParentId,
T2.PersonName AS childname, T1.ParentPersonID AS childid
FROM @Table1 T1
INNER JOIN @Table2 T2 ON T1.ParentPersonID = T2.Id
INNER JOIN @Table2 T3 ON T1.ChildPersonID = T3.id
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
add a comment |
1
This is the query which you are looking for (though the column name which you have mentioned are confusing, I think it should be reversed)
DECLARE @Table1 TABLE (ChildPersonID INT,ParentPersonID INT)
DECLARE @Table2 TABLE (ID INT, PersonName VARCHAR(10))
INSERT INTO @Table1 VALUES (1,2),(1,3),(2,4)
INSERT INTO @Table2 VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d')
SELECT T3.PersonName AS parentName, T1.ChildPersonID AS ParentId,
T2.PersonName AS childname, T1.ParentPersonID AS childid
FROM @Table1 T1
INNER JOIN @Table2 T2 ON T1.ParentPersonID = T2.Id
INNER JOIN @Table2 T3 ON T1.ChildPersonID = T3.id
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
add a comment |
1
1
1
This is the query which you are looking for (though the column name which you have mentioned are confusing, I think it should be reversed)
DECLARE @Table1 TABLE (ChildPersonID INT,ParentPersonID INT)
DECLARE @Table2 TABLE (ID INT, PersonName VARCHAR(10))
INSERT INTO @Table1 VALUES (1,2),(1,3),(2,4)
INSERT INTO @Table2 VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d')
SELECT T3.PersonName AS parentName, T1.ChildPersonID AS ParentId,
T2.PersonName AS childname, T1.ParentPersonID AS childid
FROM @Table1 T1
INNER JOIN @Table2 T2 ON T1.ParentPersonID = T2.Id
INNER JOIN @Table2 T3 ON T1.ChildPersonID = T3.id
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
This is the query which you are looking for (though the column name which you have mentioned are confusing, I think it should be reversed)
DECLARE @Table1 TABLE (ChildPersonID INT,ParentPersonID INT)
DECLARE @Table2 TABLE (ID INT, PersonName VARCHAR(10))
INSERT INTO @Table1 VALUES (1,2),(1,3),(2,4)
INSERT INTO @Table2 VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d')
SELECT T3.PersonName AS parentName, T1.ChildPersonID AS ParentId,
T2.PersonName AS childname, T1.ParentPersonID AS childid
FROM @Table1 T1
INNER JOIN @Table2 T2 ON T1.ParentPersonID = T2.Id
INNER JOIN @Table2 T3 ON T1.ChildPersonID = T3.id
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
answered Jan 2 at 10:22
Anuj TripathiAnuj Tripathi
1,791916
1,791916
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
add a comment |
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
Chose table aliases that make sense. E.g. p for parent and c for child.
– jarlh
Jan 2 at 10:43
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
how to load this table in radtreeview (telerik treeview) winform?
– xxxsenatorxxx
Jan 2 at 11:50
add a comment |
1
See code below :
using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication94
{
class Program
{
static void Main(string args)
{
DataTable dt = new DataTable();
dt.Columns.Add("parentname", typeof(string));
dt.Columns.Add("parentid", typeof(int));
dt.Columns.Add("childname", typeof(string));
dt.Columns.Add("childid", typeof(int));
DataTable dtChildPerson = new DataTable();
dtChildPerson.Columns.Add("ChildPersonID", typeof(int));
dtChildPerson.Columns.Add("ParentPersonID", typeof(int));
dtChildPerson.Rows.Add(new object { 1, 1 });
dtChildPerson.Rows.Add(new object { 1, 3 });
dtChildPerson.Rows.Add(new object { 2, 4 });
DataTable personName = new DataTable();
personName.Columns.Add("ID", typeof(int));
personName.Columns.Add("PersonName", typeof(string));
personName.Rows.Add(new object { 1, "a" });
personName.Rows.Add(new object { 2, "b" });
personName.Rows.Add(new object { 3, "c" });
personName.Rows.Add(new object { 4, "d" });
foreach (DataRow row in dtChildPerson.AsEnumerable())
{
int parentID = row.Field<int>("ParentPersonID");
string parentName = personName.AsEnumerable().Where(x => x.Field<int>("ID") == parentID).Select(x => x.Field<string>("PersonName")).FirstOrDefault();
int childID = row.Field<int>("ChildPersonID");
foreach(DataRow childRow in personName.AsEnumerable().Where(x => x.Field<int>("ID") == childID))
{
string childName = childRow.Field<string>("PersonName");
dt.Rows.Add(new object { parentName, parentID, childName, childID });
}
}
}
}
}
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
add a comment |
1
See code below :
using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication94
{
class Program
{
static void Main(string args)
{
DataTable dt = new DataTable();
dt.Columns.Add("parentname", typeof(string));
dt.Columns.Add("parentid", typeof(int));
dt.Columns.Add("childname", typeof(string));
dt.Columns.Add("childid", typeof(int));
DataTable dtChildPerson = new DataTable();
dtChildPerson.Columns.Add("ChildPersonID", typeof(int));
dtChildPerson.Columns.Add("ParentPersonID", typeof(int));
dtChildPerson.Rows.Add(new object { 1, 1 });
dtChildPerson.Rows.Add(new object { 1, 3 });
dtChildPerson.Rows.Add(new object { 2, 4 });
DataTable personName = new DataTable();
personName.Columns.Add("ID", typeof(int));
personName.Columns.Add("PersonName", typeof(string));
personName.Rows.Add(new object { 1, "a" });
personName.Rows.Add(new object { 2, "b" });
personName.Rows.Add(new object { 3, "c" });
personName.Rows.Add(new object { 4, "d" });
foreach (DataRow row in dtChildPerson.AsEnumerable())
{
int parentID = row.Field<int>("ParentPersonID");
string parentName = personName.AsEnumerable().Where(x => x.Field<int>("ID") == parentID).Select(x => x.Field<string>("PersonName")).FirstOrDefault();
int childID = row.Field<int>("ChildPersonID");
foreach(DataRow childRow in personName.AsEnumerable().Where(x => x.Field<int>("ID") == childID))
{
string childName = childRow.Field<string>("PersonName");
dt.Rows.Add(new object { parentName, parentID, childName, childID });
}
}
}
}
}
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
add a comment |
1
1
1
See code below :
using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication94
{
class Program
{
static void Main(string args)
{
DataTable dt = new DataTable();
dt.Columns.Add("parentname", typeof(string));
dt.Columns.Add("parentid", typeof(int));
dt.Columns.Add("childname", typeof(string));
dt.Columns.Add("childid", typeof(int));
DataTable dtChildPerson = new DataTable();
dtChildPerson.Columns.Add("ChildPersonID", typeof(int));
dtChildPerson.Columns.Add("ParentPersonID", typeof(int));
dtChildPerson.Rows.Add(new object { 1, 1 });
dtChildPerson.Rows.Add(new object { 1, 3 });
dtChildPerson.Rows.Add(new object { 2, 4 });
DataTable personName = new DataTable();
personName.Columns.Add("ID", typeof(int));
personName.Columns.Add("PersonName", typeof(string));
personName.Rows.Add(new object { 1, "a" });
personName.Rows.Add(new object { 2, "b" });
personName.Rows.Add(new object { 3, "c" });
personName.Rows.Add(new object { 4, "d" });
foreach (DataRow row in dtChildPerson.AsEnumerable())
{
int parentID = row.Field<int>("ParentPersonID");
string parentName = personName.AsEnumerable().Where(x => x.Field<int>("ID") == parentID).Select(x => x.Field<string>("PersonName")).FirstOrDefault();
int childID = row.Field<int>("ChildPersonID");
foreach(DataRow childRow in personName.AsEnumerable().Where(x => x.Field<int>("ID") == childID))
{
string childName = childRow.Field<string>("PersonName");
dt.Rows.Add(new object { parentName, parentID, childName, childID });
}
}
}
}
}
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
See code below :
using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication94
{
class Program
{
static void Main(string args)
{
DataTable dt = new DataTable();
dt.Columns.Add("parentname", typeof(string));
dt.Columns.Add("parentid", typeof(int));
dt.Columns.Add("childname", typeof(string));
dt.Columns.Add("childid", typeof(int));
DataTable dtChildPerson = new DataTable();
dtChildPerson.Columns.Add("ChildPersonID", typeof(int));
dtChildPerson.Columns.Add("ParentPersonID", typeof(int));
dtChildPerson.Rows.Add(new object { 1, 1 });
dtChildPerson.Rows.Add(new object { 1, 3 });
dtChildPerson.Rows.Add(new object { 2, 4 });
DataTable personName = new DataTable();
personName.Columns.Add("ID", typeof(int));
personName.Columns.Add("PersonName", typeof(string));
personName.Rows.Add(new object { 1, "a" });
personName.Rows.Add(new object { 2, "b" });
personName.Rows.Add(new object { 3, "c" });
personName.Rows.Add(new object { 4, "d" });
foreach (DataRow row in dtChildPerson.AsEnumerable())
{
int parentID = row.Field<int>("ParentPersonID");
string parentName = personName.AsEnumerable().Where(x => x.Field<int>("ID") == parentID).Select(x => x.Field<string>("PersonName")).FirstOrDefault();
int childID = row.Field<int>("ChildPersonID");
foreach(DataRow childRow in personName.AsEnumerable().Where(x => x.Field<int>("ID") == childID))
{
string childName = childRow.Field<string>("PersonName");
dt.Rows.Add(new object { parentName, parentID, childName, childID });
}
}
}
}
}
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
answered Jan 2 at 10:38
jdwengjdweng
17.8k2817
17.8k2817
add a comment |
add a comment |
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2
Did you try writing any code for this? What issue you are facing in that?
– Chetan Ranpariya
Jan 2 at 10:15
1
Join twice! One time for parentname and one time for childname.
– jarlh
Jan 2 at 10:16