Vb.net - Get The Number Of Rows Returned By OleDbDataReader?

Jun 18 10 at 0:30

After connecting to a database using DataReader, how can I count the number of rows ?

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ADO.NET :: Get Number Of Returned Rows By Data Reader?

Feb 24, 2011 04:26 PM

I have a web page where I want to return number of returned rows by datareader as I need to get Count of rows. My code is as follow :

SqlCommand cm = new SqlCommand(); SqlDataReader dr;sqlconnection cn; public int Returndatareader( int x)
{
int s;
string sqlstr = "SELECT COUNT(*) FROM P_Events as Counter";
cm.CommandText = sqlstr;
cm.Connection = cn;
cn.Open();
dr = cm.ExecuteReader();
if (dr.Read())
{
int y = dr.RecordsAffected;
s = y;
//return y;
}
cn.Close();
return x;
}

but the rows affected count is -1 everytime i run my code.

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Feb 11, 2010 02:07 PM

Trying to get the number of rows returned in a query in Visual Basic.The query returns 3 rows.Dim td As Integer = dataset1.Tables(0).Rows(0).ItemArray(0) has a value of 1.Dim tg As Integer = GridView1.DataSource.tables(0).rows.count has a value of 3.1. Why do aren't they both 3 ?2. Is there a best way of getting the number of rows ?3. Where can I find a tutorial or book that explains the notation above ?

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Jan 17, 2010 05:37 PM

I have executed my query in VB with:

[Code]....

I now want to count the number of returned rows so that I can say:IF rows_returned = 1 then login else deny
I think you get the idea.P.S. I know this is not the most secure method of login but I do not want to use the ASP.NET configuration manager as I like to understand what is happening. I am starting off very simple and I shall work up from there.

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May 01, 2010 02:37 PM

SQL Select Union and total number of returned rows?

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Feb 06, 2010 01:52 AM

Using C#, how can I check the total number of rows returned from a database when using a Repeater? The reason I need to check is I need to alter the presentation of the data when there is only 1 row returned.

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Dec 17, 2010 05:25 PM

When a user submits the query to SQL when clicking a button I need to get a count of the number of rows that are returned. Which event does the gridview.count code need to be place in?

Right now I have it in the btn_click event, but in order to get it to count the rows you have to hit the button twice since the query is not returned yet. Here is my code.

[Code]....

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Nov 25, 2009 04:47 AM

i have a gridview with following column

Origin | Destination | Month | Total Passenger
A B 1 500
A B 2 670
A B 3 730
B A 1 320
B A 2 500
B A 3 669

is it posible to count number of rows which Origin "A" and Destination "B" from my gridview?

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Apr 09, 2010 09:51 AM

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Mar 25, 2011 07:10 PM

using sql server 2005.

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what is the syntax for this? i've seen cursors using a set number (EX: loop through 5 times) but I need to create a query so that I can loop through once for each row returned from my query.

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Dec 22, 2010 09:51 PM

In our asp.net application, we use Membership.GetAllUsers() in order to allow the administrator work with the site's membership.

Is there a way to filter the rows returned by Membership.GetAllUsers() method? I'd like to be able to have a textbox where (part of) the user's first name / last name is entered and then call GetAllUsers() - or a different method - to get only the users whose name begins with value in the text box.

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Sep 26, 2010 11:48 PM

I have a property table and an image table.

I want this query to return all distinct properties and a thumbnail image. However some properties don't have thumbnail images and they don't get returned by the query. If the imgid is null I still want to return the property. Not sure of how to do this.

[Code]....

[Code]....

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May 17, 2007 11:01 AM

I'm using SqlDataSource control.Is there a way to know how many records a query has returned?

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May 18, 2010 02:21 PM

Currently I have

dlRSS.DataSource = GetRSSFeed("http://www.foodsafetynews.com/headlines.xml")
dlRSS.DataBind()
Function GetRSSFeed(ByVal strURL As String) As DataTable
'Get the XML data
Dim reader As XmlTextReader = New XmlTextReader(strURL)
'return a new DataSet
Dim ds As DataSet = New DataSet()
ds.ReadXml(reader)
Return ds.Tables(2)
End Function
<asp:DataList ID="dlRSS" runat="server" Width="100%" >
<ItemTemplate>
<strong><p><div><asp:HyperLink ID="TitleLink" runat="server" Text='<%# Eval("title") %>' Target="_blank" NavigateUrl='<%# Eval("link") %>'/></div></p></strong>
<strong><p> <div><asp:Label ID="SubtitleLabel" runat="server" Text='<%# Eval("description") %>' /></div></p></strong>
</ItemTemplate>
</asp:DataList>

But is returning all rows in RSS Feed I would only like top 5 or so

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SqlHelper.ExecuteReader Results Varying And Unexpected When Certain Number Of Records Are Returned?

Jul 4 10 at 2:21

Note: You may not need to read the whole thing to know what's wrong... skip down to the part about the 3 scenarios if you'd like. Only read the begin if you'd like some background info on how I've tried implementing this and where the errors occurred.To begin with, I'm trying to retrieve a list of Clients stored in the CRM_Clients table for a given callerId.I retrieve the clients from my Controller with the SelectLiveClientsForCaller method. The message is then passed on to the DAL through the static Instance method in the DataProvider class:

public List<Client> SelectLiveClientsForCaller(int callerID)
{
List<Client> results = new List<Client>();

[code]...

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May 29, 2010 02:19 PM

I need to check if any rows are returned in a QueryString here's what I have so far.not sure what code to put to see if the row count is greater than 1

private void BindDataToGrid()
{
//MessageBoardEntities3 is ThemeableAttribute connection string name
int TID = Convert.ToInt32(Request.QueryString["ThreadID"].ToString()); // if Post ID is int
var context = new MessageBoardEntities3();
gvPosts.DataSource = from p in context.Posts
where p.ThreadID == TID
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gvPosts.DataBind();
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}

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Oct 08, 2009 07:08 AM

I am trying to make visible a label if the returned rows are 0 in the repeater. The problem is that when it returns 0 results, I get an error

{"The IListSource does not contain any data sources."}

How do i bind the returned dataset so that I don't get that error and the footer template's lable is made visible ?

[Code]....

protected void Page_Load(object sender, EventArgs e)
{
DataSet ds = db.GetDataset("GetWebcasts");
this.rptWebcasts.DataSource = ds;
this.rptWebcasts.DataBind();
//if (ds.Tables.Count > 0)

[Code].....

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Dec 08, 2009 07:46 AM

I'm writing a small asp.net app that uses an access db. I'm using a layered architecture and business objects. In my dataaccess class, I have tis method that returns all records by UserID:

[Code]....

The problem is that the reader object is null, even though the records with the specified userid exist in the db.Using the debugger, I can see that the parameter passed to the method is correct, and the SP is as simple as:

[Code]....

I have tried using an AccessDataSource directly on the aspx page and hooking it up to a grid, and then the records are returned. Also, using my dataaccess class, I can insert new records without problems, so the connection works just fine.

I have used this model in many apps with sql server, and it allways works. So, my question is if there are any known issues when using OleDbDataReaders with asp.net? Am I using it correctly, or am I missing something?

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May 21, 2010 08:00 AM

I have an excel header that has the following header title : "REMARKS (i.e. awarded etc.)"

but it seems that it can't read the cell with the brackets or it is there is a certain length of the excel header?

While reader.Read()
Dim DataRow As DataRow = dtDataTable.NewRow()
DataRow("Remarks") = Trim(reader("REMARKS i.e. awarded etc.").ToString)
dtDataTable.Rows.Add(DataRow)
End While

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Mar 29, 2011 02:50 PM

how to get the number of rows from sqldatareader

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Feb 12, 2010 06:53 AM

I am trying to Importing Excel sheet into Sql server table using OleDbDataReader

the problem is it is not fetching the cell values with contains "," (comma) ex: cell value ="03280, 03281"

i am using OleDbConnection oconn =

new
OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source="
+ Server.MapPath("Files\LineItems.xlsx") +
";Extended Properties='Excel 12.0 Xml;HDR=YES;IMEX=1';");

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Apr 28 10 at 11:11

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I am going to receive a CSV file with 1000 rows, which will most likely add 500 000 (that is five hundred thousand) records in the database.I don't have any idea yet about this huge amount if it's going to work out well. I am afraid that it will time out.

I didn't do any testing yet, but I am pretty sure it would time out eventually.

Is there a way to make it not time out (I don't know ... split the bulkinsert into 1000 pieces :D) or I should try to do something like BCP, with a SQL job ...

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Jun 17 10 at 7:51

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1 4
2 5
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Feb 02, 2011 09:57 PM

I want to check that the row index I specify is below the row count so it doesn't throw the error

Index 2 is either negative or above rows count.

how would I achieve this with my code?

Using connection As New SqlConnection(connStr)
Dim command As New SqlCommand
command.Connection = connection
connection.Open()
Dim a As New SqlDataAdapter("SELECT top(3) name, (SELECT TOP (1) ImageId FROM Images WHERE(productid = products.Id)) AS imageId FROM Products WHERE beginnerdiscount = '1' ORDER BY Dateadded", connection)
Dim s As New DataSet()......

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Dec 16, 2008 06:24 PM

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Feb 3rd, 2010, 01:49 PM

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Code:
function SelectAll()
{
alert('a');
var gvET='<%=GrdCostPetroleum.ClientID%>';
var gridLength = gvET.rows.length;
alert (gridLength );
return false ;
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Apr 8, 2009, 01:31

m using c# .net and oracledatabase with 3 tier architecture.

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M sending the source code of my gridview and the method which i m using to display records in gridview.

[code]....

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Nov 02, 2010 03:53 PM

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Oct 27, 2009 01:20 PM

I've got a report in SSRS 2000 that I'm having a bit of difficulty with. I'm pulling my data into a matrix and need to limit said matrix to 10 rows (not per page). Due to the grouping, I cannot simply use the TOP command in my SQL query. What I've done is set a filter on one of my row groups to show only the top 10 records, but to do this by counting (actually summing with an inline if) the records for each group. My result is something like this

Result 1 Subresult 1 20

Subresult 2 10

Total 30

Result 2 Subresult 1 25

Total 25

Result 3 Subresult 1 12

Subresult 2 5

Subresult 3 4

Total 21

As you can see, it is sorting by the total amounts and will only show the top 10 totals. The problem comes in when say what would be records 9, 10 and 11 normally all have the same total. What happens is instead of showing 10 records, since those last 3 have the same total, it doesn't know where to cut it off, so it just shows 11.

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Dec 18, 2010 08:39 AM

i have create the object of

1 dataclassContext obj=new dataclassContext();

2 now i call the updateProc

int row=ob.MyupdateProc(QuestionID,peronID);
if(row>0)
{
do some thing
}

but row always retrun 0 even procdure do update in database

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Dec 19, 2008 11:48 AM

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Oct 6th, 2010, 01:32 AM

i use sql server 2005 and Visual Studio 2008.

I am using asp.ne and vb.net for my website.

i have a table with number of rows 50,000.

i want to display the number of rows at my table in a Label when the page is on load.

so can u give me the code or the hint?

my second question is.

my table has around 50,000 items.

and i have a search box, it look like this

str= select * from mytable where item='car'

the item Car is located in my table in row number of 45,000.

i guess when i search from the table where the item is car, then it will search row by rows, then as the number of rows become huge, it will be so late to find the result.

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Feb 18 at 20:29

This is my code but nothing happens.

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});

this is what i ended up using

var rqnum = $("#<%=GridView3.ClientID %> tr").length - 1;
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document.getElementById('oknum').innerHTML = oknum;
var xlnum = $("#<%=GridView5.ClientID %> tr").length - 1;
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this way it subtracts the header, however, how can i make it so if it is 0 dont subtract the -1 because i dont want negatives

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Example :

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Finally when you submit, Employee name and the list of CHECKED items will be stored in a database table.

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Feb 17 at 10:09

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Dec 07, 2009 11:13 AM

I would like the number of records returned in a repeater i.e Repeater.Count or something so I can check if it is empty or not.

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<ItemTemplate>
<li>
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