C# - How To Copy Only The Columns In A DataTable To Another DataTable

Jun 1, 2010

how to copy only the columns in a DataTable to another DataTable?

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DataSource Controls :: How To Copy The Data From One Datatable To Another Datatable Based On The Schema

Jan 11, 2010

i have the dataset with one table.Table contains three column like 'Name','Location','Pin'.I would like to move the data from another table based on schema.

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How To Copy Data From Datatable To Dataset.datatable

Oct 31, 2010

how to copy data from datatable to table in dataset i ry this but its readonly property

ds.datatable1=newdt.copy

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C# - Datatable Subset Of Columns From Another Datatable

Jul 2, 2010

I have a datatable with 17 columns and a bunch of data. I wnat a datatable with only 6 of the columns and the data for those 6 columns. So I need a subset of the original datatable. How do I loop through the original datatable with 17 columns and end up with a datatable with only the 6 columns I want with the corresponding data for those 6 columns?

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Error "DataTable Is An Ambiguous Reference Between System.Data.DataTable And Microsoft.Office.Interop.Word.DataTable"

Jan 20, 2011

'DataTable' is an ambiguous reference between 'System.Data.DataTable' and 'Microsoft.Office.Interop.Word.DataTable'

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ADO.NET :: How To Copy A Datatable Across Servers Without Looping

Dec 27, 2010

i have searched quite a bit on this one and can't seem to find exactly what I am looking for.

I think my first problem is this: How would I bring back a DataTable FOR copying? I know I would need:

Dim dt as Datatable

But then how do I get the Original Datatable in there? I think that once I have that part, I can just make a connection to my new DB inside a copy subroutine (using the .Copy method) and be done with it. That part I have the code pretty much done for, I think.

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Copy Data From DataTable To ArrayList

Jun 13, 2010

I am trying to implement ajax auto complete control using a standard webservice. inside webservice a table adapter is called which will return a dataTable containing a single column. this table adapter uses a stored procedure with following script

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Web Forms :: Copy Rows From DataTable To Another?

Feb 26, 2012

I want to copy rows from one datatable to another.

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Determine Time It Takes To Copy Datatable Into Another

Sep 21, 2010

I'm copying one datatable into another like this:

temporaryTreeData = treeViewData.Copy();

How could I figure out how much time it takes for the copy to complete?

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Forms Data Controls :: How To Copy Only Filtered Rows From GridView Into Datatable

Mar 7, 2011

I am working with GridView/TelerikGrid control. It is having filter option. When I filter the data,
I need to copy only filtered rows into Datatable for further processing.

Suppose I am having total 10,000 records. and when I filter on column say Dept="IT", I get 1000 records in grid. So these 1000 records only should get copied into Datatable. So How to achieve this ?

Cwhat can be done over this ? I tried number of properties for grid. But there is no property which will return fileterd data source. Also I am not able to go every page of Datagrid and collect the data. I can get data for first page only. If I need to collect the data by going to every page of gridview, what is the way for this ?

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ADO.NET :: Columns Are Not A Member Of DataTable

Feb 17, 2011

I am getting this error whilie bulding project. i simply has defined a datatable accessing its rows and columns. don't knw why it says Columns is not a member of 'DataTable.

Error 66 'Columns' is not a member of 'DataTable'. E:DOI1TableReports.aspx.vb 342
Error 65 'Rows' is not a member of 'DataTable'. E:DOI1TableReports.aspx.vb 297
Error 73 'NewRow' is not a member of 'DataTable'. E:DOI1TableReports.aspx.vb 410

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Pass Datatable To The Mvc View Error / CS0246: The Type Or Namespace Name 'DataTable' Could Not Be Found

Sep 28, 2010

I was reading: [URL]

But I have give a compilation error:

CS0246: The type or namespace name 'DataTable' could not be found (are you missing a using directive or an assembly reference?

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Forms Data Controls :: Set A Column In A DataTable To Be A Primary Key For An Existing Datatable

Apr 2, 2010

If I am passed a datatable and I cant change the column structure..is there anyway to set an existing column to a Primary key so I can easily Find() the row I am looking for?

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Data Controls :: Copying Specific Records From One Datatable To Another Datatable

Aug 22, 2012

im trying to copying specific record from one datatable to another datatable i used below code

public System.Data.DataTable selectspecificdatarow(System.Data.DataTable dtg, int count, int startindex)
{
System.Data.DataTable dtn = dtg.Clone();
for (int i =startindex; i < count; i++)

[Code]....

its taking too long time in cloneing is there any better way to do this task which is Time effecent

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Datagrid With 2 Columns That Have Different Datatable Rows?

Feb 9, 2010

i want to make a datagrid with 2 columns and many rows the columns i want to have databinding with a datatable

i want the 1 row 1 column of datagrid have data from 1 row of datatable
i want the 1 row 2 column of datagrid have data from 2 row of datatable
i want the 2 row 1 column of datagrid have data from 3 row of datatable
i want the 2 row 2 column of datagrid have data from 4 row of datatable
......
......

i use something like this

[code]...

but i have two times the same in tha datagrid left and right

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C# - DataTable From Session Memory Has No Columns

Jan 18, 2011

Im trying to retrieve a datatable that I put into a session variable, however when i do it apears that there are no columns... I have done this before in VB.NET, I'n now using C#, and it worked perfectly, and as far as i can see there is no change in the code other than the obvious syntax changes.

EDIT: The dt (in part 2) variable has the right data when i look in the data visulization window, but i have noticed that the other properties associated with a datatable are abscent. When i hover over a normal looking datatable with my mouse it looks like the following: " dt ----- {System.Data.DataTable}" but in the class im working on it just looks like "dt ----- {}". Also, after I return the session variable into the dt I clone it (dtclone = dt.clone(); ) and the clone is empty in the data visulizer.... what on earth!

EDIT 2: I have now also tried converting the first datatable to a dataset, putting this in the session variable, and recoverting it back to a datatable in the class. Am starting to wonder if it is a probelm with: dt.Load(sqlReader); The data does appear after this step though in the dataset visualiser, but not after being cloned. Code below.

1) SQL command in a webhandler, the results of which populate the datatable to be put into the session variable.

DataTable dt = new DataTable();
SqlDataReader sqlReader= default(SqlDataReader);
SqlDataAdapter sqlAdapter = new SqlDataAdapter();
sqlReader = storedProc.ExecuteReader(CommandBehavior.CloseConnection);
dt.Load(sqlReader);
System.Web.HttpContext.Current.Session["ResultsTable"] = dt;

2) Part of the code in a class which performs calculations on the table:

DataTable dt = (DataTable)HttpContext.Current.Session["ResultsTable"];

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Controls :: How To Add And Remove Columns In Datatable

Feb 25, 2016

I want to add and remove columns on specific conditions. how it's possible.

Alert: Add and remove  not Hide and show...

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C# - How To Join Two Datatable Datas Into One Datatable To Show In One Gridview

May 24, 2010

how to join two datatable datas into one datatable to show in one gridview

i.e in 1 datatable i have username and pwd and in another datatable i have that user details. how to show all these in one datatable to get those values display in gridview(asp.net)

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C# - How To Create An Ilist From DataTable With Unknown Columns

Oct 27, 2010

I have a DataTable that was built from dynamically created SQL, so I do not know the number of columns in the datatable.

How can I convert this datatable into an IList?

EDIT: I am then going to use this to send to a Telerik Grid on the page.

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SQL Server :: Transpose Rows To Columns In Datatable

Feb 23, 2011

This is datat table format :

TagName Timestamp Value
Tag1 21-2-2011 12
Tag1 22-2-2011 1
Tag2 21-2-2011 13

I want in this Format

TimeStamp Tag1 Tag2
21-2-2011 12 13
22-2-2011 1 0

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C# - Setup Format For Columns Of DataTable Or GridView?

Apr 2, 2010

How can I setup some format for cells in some column in my DataTable or GridView ?I need to make some double columns rounded , for example :

3.564643 -> 3.56
3.546723 -> 3.55
6.654644 -> 6.65

DataFormatString ?where ?Question still active, I didn't solved the problem :-/

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Bind RadcomboBox With Multiple Columns From Datatable?

Feb 8, 2011

I would like to bind 'Id', 'Name' and 'Email' from DataTable to RadComboBox. It's possible with ItemTemplate. But I don't want to display 'Email' column in the RadComboBox. I want display 'Email' in the label when the selectedIndexChanged. Is this possible?

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Forms Data Controls :: Filter The Columns Of A DataTable?

Aug 2, 2010

I've built a User Control that contains a ListView. To make it work I need to pass to it a DataTable. The columns of this DataTable need to have particular names that match up with what the ListView is expecting. I have a large DataTable that I need to massage/convert over to this different format. To do that I need to filter out columns and rename the column names. The actual data in the DataTable doesn't need to change. Is there a good way to do this without actually instantiating a new DataTable and copying the data from the large DataTable into it?

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Forms Data Controls :: Specify Which Columns Are In A DataView From A DataTable?

Mar 24, 2010

HOW TO specify which columns are in a DataView from a DataTable. I want to create a DataView, that only has the columns from a DataTable that I choose, and in the order I want.

Example:
// DataTable_MyTable ~~ Column #0 is for ID. I do not want my view to get this column.
// DataTable_MyTable ~~ Column #1 is for TYPE. I want this column to come in 2nd place in my view.
// DataTable_MyTable ~~ Column #2 is for NAME. I want this column to com in 1st place in my view.

DataView DataView_MyView = new DataView(DataTable_MyTable ~~ some how only get the columns I want, and in the order I want ~~);

// DataView_MyView now has only 2 columns.
// DataView_MyView ~~ Column #0 is NAME.
// DataView_MyView ~~ Column #1 is TYPE.

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Changing The Order Of Columns When Binding DataTable To A GridView

Mar 31, 2010

How is it possible to change the displayed order of columns from a DataTable?

For example, dataTable "dt" contains two columns "a" and "b". I bind it to a GridView like this:

gridView.DataSource = dt;
gridView.DataBind();

But I'd like the GridView to display "b" first (leftmost).

Important point: I'm using this to export to Excel and there's no actual output to screen, using:

HtmlTextWriter htw = new HtmlTextWriter(sw);
gridView.RenderControl(htw);

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