Insert A Column In Datatable?
May 28, 2009How to insert a column in datatable at Perticular index in vb 2003.
View 4 Replies
ADVERTISEMENT
Have A Datatable Which Has 5 Column : Copy Only Its 2 Column In And Save It Into New Datatable?
Mar 15, 2009I have a datatable which has 5 column. It is possible to copy only its 2 column in and save it into new datatable.I used this code but it copies all the 5 column
Code:
Dim qry As DataTable = (From obj In temptable Where obj.Item("Column1") = 0 _
Select obj).CopyToDataTable
i used this one but it is not supported
Code:
Dim qry As DataTable = (From obj In temptable Where obj.Item("Column1") = 0 _
Select obj.item("Column1"), obj.item("Column2")).CopyToDataTable
Referencing A Column From Another Column In Datatable?
Feb 5, 2012I have a data table, i want to add a new column on that table, the data in that new column will depend in the data from another column. Now i can think of two ways to accomplish this, first is loop through the whole table and do the statements to get my new columns appropriate data. the second approach would be to give the new column an expression, then convert the table to xml (to remove the expression) then convert the xml string back to datatable.
Now, is there any other way around this? what could be the most optimized way in solving this task?
Make Boolean Column Editable (asp.net VB GridView Filled By DataTable That Has Boolean Column) ?
Oct 27, 2011After Filling a DataTable in GridView's DataSource . A column with check box Type appears but it created as read only column and I can't enable it or make it editable... even i tried .readonly = false and still can't be edited
View 1 RepliesInsert GUID Into Datatable?
Jun 22, 2010I'm calling a GUID with a system function and trying to insert it into a database as a primary key. i'm using vb 2010 .net framework with sqlce server making my datatables. the column is AutoNumber which i set up to be a uniqueidentifier. the length is not adjustable and set at 16. i got all kinds of not parsing query errors. i've edited the insert statement a bunch trying to figure this out. i've went so far as changing the table schema of AutoNumber to be just a nvarchar with length of 100. it's something to do with how i'm inserting the GUID. in the code below i'm converting it into a string then inserting it into my table. is this wrong?? i've tried finding other ways of doing it but it's a little confusing. everything else in the code works perfectly it's just this part that is keeping me from completion.[code]...
View 2 RepliesUnable To Insert New Row Into DataTable
Feb 13, 2011I am fairly new to visual basic 2008 but not to visual basic(vb6). I want to insert a new row in the database table (library.mdb). I connected the database into my project and is bounded by a dataGridview control. I have no problem in getting the records from the database. I used the code under click event of a commandButton, after clicking the button neither the record inserts in the database table nor the program generates any error. The code I used is :
Dim bkrow As LibraryDataSet.Book_MasterRow
bkrow = LibraryDataSet.Book_Master.NewBook_MasterRow
With bkrow
.B_no = B_noTextBox.Text
.ISBN = ISBNTextBox.Text
[Code] .....
Here Book_Master is the database table. LibraryDataSet is the dataset, Book_MasterTableAdapter (not used in the above code) is the TableAdapter. Is there anything missing in the above code? Is there any other method to enter data into the database in visual basic 2008?
Add A Column In DataTable Say, Dt = New DataTable()?
Dec 30, 2010I have a string say, str = "system.Int16" I want to add a column in DataTable say, dt = new DataTable()I want DataType for that column as per 'str', i.e. System.Int16 Then How to? dt.Columns.Add("MyColumn", ...)
View 2 RepliesInsert A DataTable Into A DataBase Without A Loop?
May 23, 2010I have created a gridview to allow users to type two fields in each row after that I added the user data into a DataTable now I want to insert this DataTable content into the database where each row will have 1 uniqe Id in the database without using loop.If it is not possible without a loop please show me how to do this with the loop Again I already have the DataTable filled up and it is ready to be inserted into the database?
View 2 RepliesInsert A New Line In A Cell Of Datatable
Aug 4, 2010I'm trying to insert a new line in a cell of my datatable. When I hover the cell it shows it like it should. Everything has a new line.[code]
View 1 RepliesInsert An Entire DataTable Into A SQL Server At Once?
Oct 7, 2009I have a SQLClient.DataSet in VB.NET, and I want to insert the entire thing into a SQL Server table without having to do the following:
[Code]...
Since I've got close to a million rows (all pretty skinny, so it's not much space), I obviously don't want to run this loop and generate a million INSERT statements.
I know that one option is to use a linked server when I initially fetch the data, since it's coming from another SQL Server, and just have it to the INSERT from there. However, if I already have the data in my application, is there a more efficient way to bulk insert it? Can I somehow pass the DataTable as a parameter to SQL Server and have it sort it out and insert the rows?
Insert DataTable Iinto Database?
Aug 9, 2010[code].....
View 4 RepliesCan't Add A New Column For DataTable
Nov 6, 2010Can't add a new column for DataTable
View 2 RepliesFirst Column Value In A Datatable?
Mar 26, 2010I have a dataset with just 1 datatable and 1 row but with 2 columns.I want to get the value of the 1st column.How can I get it in vb.net
View 3 RepliesSum Up A Column In A Datatable Against An Other Column In Same Datatable?
Apr 27, 2012i have a Datatable having following result from database
ID Name Class FeeName Amount
9 gumman hgjgh 6Th Fine 0
9 gumman hgjgh 6Th Tution Fee 3000
9 gumman hgjgh 6Th Lebority Fee 500
10 AAdil Hussain 5Th Fine 0
[Code]...
Insert DataTable To Asp GridView That Contains Already Built Columns?
Oct 23, 2011I need a way to insert DataTable to asp GridView that contains already built Columns with turning autoGenerateColumns to False I just need to connect some DataTable's Columns to specific columns in Grid and
change other stay as they are
Performing Insert And Update On A DataTable Using LINQ
Jul 12, 2011I am pretty new to using LINQ and have been trying it out querying my strongly typed DataTable.
I have managed to perform a 'Select' ok but was wondering if someone can point me in the right direction to do Insert and Updates. I'm not sure if LINQ is best doing an insert at all?
My Select code is as follows:
Dim results = From myRow In _dt.AsEnumerable() _
Where myRow.Language_key = Lang And _
myRow.Section_key = SectionKey And _
[Code]....
Sqlite Multi Insert In One Command From Datatable?
Jun 2, 2012I have this code, but it only inserts 7 records out of 54. i am sure that the records are fine in the datatable.
Dim dt As DataTable
Dim sc As SQLiteCommand
Dim Script As String = Nothing
Dim Script2 As String = Nothing
Dim Script3 As String = Nothing
[Code]...
.net - Moving A Column In A Datatable From First To Last?
Oct 15, 2011I have a sql stored procedure that returns a certain group of columns in my datatable. How can I move (let's say) the column in the first position, to the last position before I export the datatable to excel ?
Dim myConn As New SqlConnection(strConnection)
Dim myCmd As New SqlCommand(strSQL, myConn)
Dim dt As DataTable = New DataTable()
Dim da As SqlDataAdapter = New SqlDataAdapter(strSQL, myConn)
[code]....
Add Column To Csv File Or Datatable?
Aug 3, 2011I have a csv file that comes in I put it into a dataset and do a little manuipulation of the appearance of how the data is presented and then I put it back out into a different csv file that our 3rd party application will except. I was importing it into SQL Server and then doing a select statement to grab the data back out in the format I required. However I'd really like to eliminate the need for the SQL Server use.
So my question is how do I add in the 1st column of a CSV file the column name "KC" with a value of "1" there will only be 1 rows worth of data, mind you it's 55 columns long but there is nothing I can do about that, it's the way it has to be.So do I do this in the DataTable or when I create the CSV file? And how do I do this?
[Code]...
Button Column In A DataTable?
Feb 7, 2011Is it possible to have a button column in a data table like there is in DataGridView?
View 2 RepliesGet Column Names From Datatable?
Mar 16, 2012I need to limit the amount of columns being returned from a datatable from 14 to 5 or 6. Date, Hour and 3 to 4 decimal columns. Is it possible to do something like a SQL 'Like' to specify which columns I want?
View 8 RepliesGet The Column Names From A Datatable?
Jul 22, 2011So i create a datatable from a table i can't directly view(i.e. using sql server management). I want to find the column names that are in the datatable, what would be the correct way do this?
View 3 RepliesSelect Some Column From DataTable?
Jun 6, 2010I need to Quarry from Data Table Like
select Name, Address from myDataTable where name = 'x'
and
select distinct(name) from myDataTable
Sum All The Value In Column 'Counter' In Datatable?
Jun 2, 2011What's wrong with my LINQ query ?
Dim s = (From rowItem In i.AsEnumerable() _
Select rowItem("COUNTER")).Sum()
I'm trying to Sum all the value in column 'Counter' in my Datatable. 'Overload resolution failed because no accessible 'SUM' accepts this number of arguments.
Sumarize A Column In A Datatable
Jun 9, 2012My problem is that i want to use the Compute method for a datatable.[code]The name of the column of that i want to sumarize is 2012, but it seems that the compute method doesn't recognize it as a column and throw this exception Syntax error in aggregate argument: Expecting a single column with a qualifier 'Child'.It is not possible to me to change the name of the column, what can i do in this case to sumarize the datatable and save it in a variable
View 4 RepliesVS 2008 - How To Add Third Column In DataTable
Jan 29, 2010I have following codes
str2 = "select sno,name from employees where sno =" & Val(Me.TextBox1.Text)
cmd2 = New SqlClient.SqlCommand(str2, con)
da2 = New SqlClient.SqlDataAdapter(cmd2)
dt2 = New DataTable
da2.Fill(dt2)
Now dt2 has two columns as sno and name
But I want to add a 3rd column city type char(80)
Asp.net - Insert Datatable Into A Database Table From A Stored Procedure?
Feb 29, 2012I have a datatable with some rows I need to insert that datatable in to database using a stored procedure.
For Each row As DataRow In dt.Rows
cmd.Parameters.Add(New MySqlParameter("@DOWNLOAD_ID", dt.Rows(0)("DOWNLOAD_ID").ToString()))
cmd.Parameters.Add(New MySqlParameter("@FINALY_FIELDCODE", dt.Rows(0)("FINALY_FIELDCODE").ToString().Replace("|", "").ToString()))[code]....
When i do this I got an exception {"Parameter '@DOWNLOAD_ID' has already been defined."} How to get rid of this exception and can we insert the datatable with out for loop.
Database - Insert A DataTable With Existing Key To A SQL Server Table
Mar 18, 2010I am working with VB.NET.. i have a DataTable called "QUESTION", containing 3 fields:
QuestionNumber (unique integer key)
QuestionText
QuestionType
In my SQL Server database I created a Table called "QUESTION" with the same fields.
QuestionNumber is defined as integer unique key, auto increment
Now, when i make a bulk copy to insert the DataTable into the SQL Server, the database overwrites my QuestionNumber from the DataTable and generates new ones (starting from 1 increment 1).
How do i have to change my database setup, that the original QuestionNumbers are copied into the database?
Refering To DataTable Columns And DataRelations With INSERT..SELECT?
Dec 3, 2008There are plenty of SELECT (...) VALUES (...) statements and Parameters phrases to go with the VALUES. Those appear unhelpful to me as I have no form fields or datagrids and will be working with all the rows in a DataTable in a DataSet. Once started, this application will run to completion, writing as few as 10000 rows or as many as 250000 rows
My Task is to write out the contents of each specified DataColumn in the DataTable, one DataColumn at a time. The insert will also include the key columns and use the datetimestamp of the records as a criterion. Nulls in the specified columns are included.
My source is a DataTable, my target for the Insert is a "tall-skinny" table in an Access database. There is a smaller DataTable that is related to the source DataTable, if I was writing from within the AccDB I would use Joins. I have created a DataRelation, but have no idea how to use it in this context..
I have tried many different SQL statements but they all fail on Select. Here are snippets of the code:
'now, instantiate the specified DataTable from among the DataTables filled above
strDDTableNm = CStr(rsDDTblNms.Fields("Table_Name").Value)
Dim dtSrcTable As DataTable
[code]....
Add Data To A Access Datatable Column?
Feb 10, 2009I am trying to add data to a access datatable column I am using a richttextbox to fill in any data but when i save it to a column in a database and if there are more chars then 255 then i get an error (try to enter more then column lenght) anything under 255 is working fine the column in access = type of 'MEMO' so no limited to 255 it's the hystory to send that is giving me the problem
Dim history_to_send As String
Dim day_to_send As Date
Dim ID_to_send As Integer
[Code]....