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

edited Jan 2 at 10:34

asked Jan 2 at 10:12

xxxsenatorxxx

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

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

edited Jan 2 at 10:34

asked Jan 2 at 10:12

xxxsenatorxxx

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

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

edited Jan 2 at 10:34

asked Jan 2 at 10:12

xxxsenatorxxx

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

edited Jan 2 at 10:34

asked Jan 2 at 10:12

xxxsenatorxxx

629

edited Jan 2 at 10:34

asked Jan 2 at 10:12

xxxsenatorxxx

629

edited Jan 2 at 10:34

asked Jan 2 at 10:12

xxxsenatorxxx

629

asked Jan 2 at 10:12

xxxsenatorxxx

629

asked Jan 2 at 10:12

xxxsenatorxxx

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

Did you try writing any code for this? What issue you are facing in that?

– Chetan Ranpariya
Jan 2 at 10:15

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

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 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 |

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

jdweng

17.8k2817

add a comment |

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54004470%2fhow-to-load-data-from-sql-to-datetable-that-show-in-treeview%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

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 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 |

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 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 |

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 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 Tripathi

1,791916

answered Jan 2 at 10:22

Anuj Tripathi

1,791916

answered Jan 2 at 10:22

Anuj Tripathi

1,791916

answered Jan 2 at 10:22

Anuj 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 |

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

how to load this table in radtreeview (telerik treeview) winform?

– xxxsenatorxxx
Jan 2 at 11:50

add a comment |

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

jdweng

17.8k2817

add a comment |

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

jdweng

17.8k2817

add a comment |

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

jdweng

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

jdweng

17.8k2817

answered Jan 2 at 10:38

jdweng

17.8k2817

answered Jan 2 at 10:38

jdweng

17.8k2817

answered Jan 2 at 10:38

jdweng

17.8k2817

add a comment |

draft saved

draft discarded

Thanks for contributing an answer to Stack Overflow!

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

Search This Blog

Ufyukyu