ADO.NET :: How To Cast DataTable To DataRow
Jan 5, 2011I m trying to cast DataTable.Rows to DataRow in VB but could not manage!
Here is the sample code:
[Code]....
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A ProductsTable should be able to return its own ProductRows w/o resorting to a cast, no? Can't find how to do it otherwise. I'm thinking how to go about creating a form where the user will only ever be working on one record at a time. Wouldn't it make sense for the DAL to return a ProductsRow instead of a ProductsTable?
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[Code]....
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exact coding that i have written is as follows:
[Code]....
So, where i am getting wrong?
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View 3 RepliesADO.NET :: Returning A Blank DataRow?
Oct 19, 2010I have a method like
public DataRow
GetItem(ENTITY_TYPE
EntityType, long EntityID)
This fetches a row and returns it. Pretty simple.
However I can't test in the method to see if the row was fetched, as the method has to end with:
return ds.Tables[0].Rows[0];
If the row wasn't fetched, this errors as there is no row at position 0.
I can't do this:
DataRow dr;
if (ds.Tables[0].Rows.Count
== 1)
{
dr =
ds.Tables[0].Rows[0];
}
return dr;
.. because then I get an error that I can't return an uninitialised variable (dr).
I can't stipulate what the columns are and return a "blank" DataRow as far as I can see, because it's dynamic so I don't know what the columns will be. There doesn't seem to be a way to instantiate the DataRow return var except by assigning, er, a DataRow. Which I may not have.
I don't really want to switch to using the ItemArray and pass arrays about, I'd rather just pass the DataRow object as this is in a loop which might process a lot of rows.
Web Forms :: Add Linkbutton Into Datarow?
Nov 29, 2010[url=http://www.upanh.com/upanh_untitled/v/6tu4czcr7sd.htm][img]http://ca7.upanh.com/16.993.21338424.vtS0/untitled.jpg[/img][/url] [code] private Controller ctl = new Controller(); ..... DataTable db1 = new DataTable(); ArrayList arr1 = new ArrayList();
arr1 = ctl.getAlljob(); db1.Columns.Add("IDjob"); db1.Columns.Add("product"); .... db1.Columns.Add("report"); foreach (Job j in arr1) { DataRow dr = db1.NewRow(); dr["IDjob"] = v.getjobid.ToString(); .... dr["report"] = "Report"; <=== it show
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Feb 22, 2011I got a datarow[], that will further filter a datatable.
From the datarows, result, how can I add in the function to order the value and group the values?
[Code]....
How To Store Array Values Into Datarow
Oct 5, 2010I have string array values in
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i want to store this array values in datatble column
[code]...
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Mar 19, 2010im trying to retrive all the values in the datatable
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here the code i use let me know what am i missing
[Code]....
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Feb 18, 2011I want to find out the bound datarow or datatable of a datagrid on postback. I have a ButtonColumn in the grid. On click of the button, I'm trying to determine the datarow so that I can access the primary key and pass it to another page. The primary key is not bound and therefore not visible in the row.
For example I have a list of Customers, with an edit button. On clicking of the edit button, I want to open CustomerEdit.aspx?id=10. I am able to trap the click event on the server side in the DataGridCustomer_ItemCommand event. But am not able to get access to the datarow of the e.Item.ItemIndex.
On postback I'm NOT binding the datagrid. On accessing DataGridCustomer.DataSource, I get "Nothing". Is there a way to get the DataSource or the Datarow?
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Then i tried converting into DataRow. But it says. "object reference not set to an instance of an object"
DataRow dr = null;
string[] strconcat = new string[100];
dr["concat"] = strconcat[i];
Edit-- Actually i was trying put these string array values into dropdown (ddchooseadeal).
[Code]....
ADO.NET :: Copy Datarow Content Without Foreach
Jan 12, 2011 have 5 datatables and will add up more, what i need is to copy the content(rows) of the each and every datatable in a separate datatable. All the datatable columns are same. Is that possible without foreach statements. We can achieve the results in foreach
but the datatables will contain more rows, so iterating each and every datatable will affect the performance.he code i implemented is exact thing i need, but without foreach statement. To copy content of each and every datatable and put the content in a final datatable
DataTable dat = new DataTable();
DataRow Dr = dat.NewRow();
dat.Columns.Add("c1", typeof(string));
Dr[0] = "01";
[code]...
ADO.NET :: Converts A Datarow To BaseClasses.Subscription?
Jan 23, 2011I have a few procs which use a datareader as illustrated below:
[Code]....
In the real scenario there are many more fields than the 2 in the example so each time I make a change to BaseClasses.Subscription I have to change code throughout. I already have a method which converts a datarow to BaseClasses.Subscription which I call like this:
public BaseClasses.Subscription RowToSubscription(dr)
It would be great if I could do it with the datareader too, something like this:
[Code]....
How To Assign DataRow To Variable In Grid
May 10, 2013Right now I am using a grid control from ComponentOne which I have to stay with. When I click an link in the row which fires a grid_ItemCommand event one of the parameters passed is e As C1.Web.C1WebGrid.C1CommandEventArgs. I want to change it where I am selecting a row with a checkbox in a column and then click a button to process the row selected. So I need to get the value it is putting in e and pass that which is used in another sub.
Here is how e is assigned to "row" as DataRow.
Code:
Private Sub grid_ItemCommand(ByVal sender As Object, ByVal e As C1.Web.C1WebGrid.C1CommandEventArgs) Handles grid.ItemCommand
Select Case e.CommandName
Case "Renew" ' Renew barcode
Dim row As DataRow = CType(e.Item.DataItem, DataRowView).Row
VS 2008 DataRow Error System.NullReferenceException?
Jul 26, 2010When I click on my btnMissionary_Click which is suppose to add a datatable row I am getting the following error:
System.NullReferenceException: Object reference not set to an instance of an object. If I add a entry right away it seems to work fine.
Here is my form
HTML Code:
<div id="container">
[code].....
.net - Make A DataRow Class That Implements ILiquidizable?
Dec 12, 2010I'm trying to use Dot Liquid which is one of the coolest templating engines for c#.
Dot Liquid uses a way in order to make using templates safe. Here is the explanation page.
Here is the Explanation from it's wiki:
[code]...
So when I pass DataRow to liquid, liquid wont let me show it's content and tells me that:
'System.Data.DataRow' is invalid because it is neither a built-in type nor implements ILiquidizable
Is there any solutions to pass DataRow object that implements ILiquidizable too?
C# - A Linq Question With IEnumerable<DataRow> Result
Dec 21, 2010How can i convert following sql guery to LINQ in C# ? I dont need all columns from both tables and the result set should be IEnumerable<DataRow>
select c.level,cl.name,c.quantity
from dbo.vw_categories c
left join dbo.vw_categoriesLocalization cl on c.level = cl.level and cl.language = 'en'
where c.level like '000%' and c.level <> '000';
Forms Data Controls :: Add Hyperlink To A DataRow?
Jun 23, 2010I have a manual binded grid view from a datatable. The datatable is also manually generated.
When I generate the datatable, I will have a datarow, and i was thinking to add a hyperlink the the last column of every row. I have something like this, but it just not giving my desired output.
[Code]....
Split DataRow Element On HTML Tags?
Mar 3, 2011I am reading the "TEXT" string from a SP that could contain up to a million char. It's a clob field. After the HTML converstion, the "TEXT" field could have no closing HTML bracket. I want to look for the last </P> and then add the remaining characters to "TEXT2".
foreach (DataRow
dr in dcTruck.TruckNarrative.Tables[0].Rows)
{
[code]...
