ADO.NET :: Get Number Of Returned Rows By Data Reader?
Feb 24, 2011
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.
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.
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 ?
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.
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.
I am having problems with the following. On debugging I find that when strKeywords = '', reader = "System.Data.SqlClient.SqlDataReader". However, as soon as strKeywords takes the value of anything else, reader = nothing. But the stored procedure handles the arguments fine, so I am very confused!
I came across a situation where a user selects no of rows from dropdown , depending upon the user input, automatically that no of editable rows should appear to input data...(maximum 8 rows only)
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
I have as script that runs a stored procedure to fetch a comment along with it's id. There are multiple comments and I want to display them but I am having problem with display all the records. Here is my code:
Using con Using sda As New SqlDataAdapter() Try cmd.Connection = con Catch ex As Exception Response.Write("Error" & ex.Message)
[code]...
How do I make it so that the returned results will be like this:
i need to query a table which normally will return multiple records for the id and I need to loop through probably using a cursor and pull values out from each record to make a string.
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.
I have textbox with search button the result it's show , but if there is a way to count how many rows was found were cathing the data form database. I'm using gridview + ado.net + gridview i handle all the events manually....
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.
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.
I'm using a table adapter to perform my queries. I'm sure I'm missing something really easy, but I can't figure out how to return the number of rows returned from a query to a dataset used for a GridView.Basically, I want to display a message "No records exist for your selection" by testing for ReturnedRows = 0.
Excerpt of C# code:
handoutDSTableAdapters.handoutTableAdapter handoutsAdapter = new handoutDSTableAdapters.handoutTableAdapter(); gv_Handout.DataSource = handoutsAdapter.GetDataByDoctor(Int32.Parse(ddl_MD.SelectedValue)); gv_Handout.DataBind();
I am trying to follow an example from Lesson #25 of [URL] I am not trying to do paging as the above example is doing. I simply want to do a Query and return the the number of rows back in my code behind.
I have a DAL Typed Dataset with the following Query
SELECT COUNT(*) AS Expr1 FROM Reservation WHERE (DateUsed = @DateUsed) AND (SiteID = @SiteID)
I have a datagrid in aspx page.Inside of datagrid i am using around 15 controls such as Button,dropdownlist and text box
controls.Once the datagrid binds then the events in the aspx page not firing.Issue occured when the number of rows greater than 500.The number of rows less then its works fine.
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>();
I have some code in my vb.net code behind that queries a database, and if there is data, outputs it from the codebehind to a datalist on my asp.net page. In addition to sending the data to the datalist on the page, I need to take the value from "mbillaty" that is returned from the sql query, and have that value be the selected value for a drop down box also on the page. I can get either the datalist to fill, or the selected value for the dropdown box to be selected depending upon which bit of code I place before the other (ARGH), but I can't get them to both work together on the page. What am I doing wrong?
I'm looking for the correct syntax to get me the last row of a repeater item and use it in a literal below. As you can see I have the item index syntax already. assume that there is a repeater control surrounding the literal already.
I have already bound the data so it will not use obitemdatabound .
<asp:Literal id="Rpt_ItemCount" runat="server" Text = '<%# (int) DataBinder.Eval(Container, ItemIndex"))%>'></asp:Literal>
