Hello, every one! This is my first post on the forum. I got some questions about caching data with SqlDataSource controls in asp.net 2005. Here are them:
According to the vs.net 2005 documents, SqlDataSource controls will sustain an individual cache for each combination of ConnectionString, SelectCommand and values of SelectParameters. But how about FilterExpression and FilterParameters? If I enable caching and change the FilterExpression or values of FilterParameters, will the SelectCommand be reexcuted, or will the databinding controls just get data from the existing cache? And will multiple SqlDataSource controls with the same combination of ConnectionString, SelectCommand and values of SelectParameters share a common cache, or sustain caches of their own?
Hello All, I want to use SQLDataSource as a base of all Gridview in my application. I have read that SQLDataSource support caching. I want to know as SQLDataSource is a child control of page class. It will get unloaded when page is unloaded. So how caching works. Like I am using SQLDataSource as base of my GridView control. When I perform paging or sorting,In theory It says that It will not hit the Datbase again. It will keep that Data in memory as DataSet, but this will stay alive upto life of page, which starts again and again when a page is requested, So as its child controls. Can anybody give me more intrinsics on this. Any Help from Microsoft is appreciated !!!! Thanks !!
I know I can use the SqlDataSource object and cache the results by setting it's enableCache property to true, but what if I am using essentially the same SqlDataSource control across multiple pages? For instance I have a States SqlDataSource on many pages in my site, if I enable caching on all of these objects won't they all be cached separately? Is the solution to not use the SqlDataSource and instead cache the datatable of results and bind the dropdownlists to that? Thanks in advance.
Hi everyone!I tried to set my SqlDataSource's SelectCommandType to be a stored procedure. However the SqlDataSource failed to cache it. But if I just copy paste my stored procedure's content to my SqlDataSource's SelectCommand property, the cache just works. Is "StoredProcedure" as the "SelectCommandType" is not supported when caching the data? Or am I missing something here? Please help.
I have a control that shows the top 5 best selling products. Thes list does not need to be up to date at all times. Ideally I would like to cache the data for say 24hr before pulling it again if someone accesses the control. I thought there was an easy way to do this, but I can't seem to find anything. Can anyone point me in the right direction.
I wrote an invoice report that gets its data from an Oracle database. This is working fine except when users change something on the server (like adding a new charge to the invoice) then when they re-run the SSRS report the new line doesn't show up. They wait 15 minutes and re-run the SSRS report and then it appears.
It is like the SSRS report is caching the old data of the report.
Points to note though...
To execute the report I am using the SSRS 2005 webservice. I understand that there is 2 cachings, 1 server and 1 IIS side. I have not cached the server and don't know how to clear the IIS side. I see there is a rs:ClearSession=true parameter that you can pass in but by using the SSRS 2005 webservice this is not an option (I don't see how you can pass query strings in to the call).
I have a page containing a FormView, which gets its data from a SqlDataSource control and displays details of a job. Two of the fields are location and job title. I want to re-use this data to create a dynamic page title. I know I can do this by setting the Page.Title to what I want to, but do I have access to the data outside of the FormView to which the data source is bound? If so how? Or will I have to perform an additional SELECT statement to get this data again?
and what this does is fills the dataset with the information from the select command in the dataadapter and then gets the value for the first row of the fieldname
It doesnt seem like this should be that big of a deal, but it has become very frustrating trying to find the answer, does anyone know how to do this? Please post some demo code if possible
Hi Everybody,I have an ordinary SqlDataSource on my page <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:P4SConnection %>" ProviderName="<%$ ConnectionStrings:P4SConnection.ProviderName %>" SelectCommand="SELECT CO_Id,CT_Name,CO_Username,CO_Password,CO_Company,CO_Email,CT_Id,CT_Position,CT_Admin, CO_Session,CO_LastLogin FROM company_contact LEFT JOIN company ON company_contact.CT_Company = company.CO_Id WHERE (CT_Username= & LCase(txtName.Text) & "> </asp:SqlDataSource>How do i use any of these values?I know I can display the values in a GridView or something but I dont want to display them.I originaly was using ODBC and just used the followingDim Row As DataRow = thisTable.Rows(0) Dim lP_ID As String = Row(0).ToString() Dim TheContact As String = Row(1).ToString() Dim theName As String = Row(2).ToString() Dim thePassword As String = Row(3).ToString() Dim TheCompany As String = Row(4).ToString() Dim TheEmail As String = Row(5).ToString() Dim lP_ContactID As String = Row(6).ToString() Dim ThePosition As String = Row(7).ToString() Dim bAdmin As Boolean = Row(8).ToString() Dim sP_Session As String = Row(9).ToString() Dim sP_Last As String = Row(10).ToString()Then I could use the values wherever I wanted.How do I do this with a SqlDataSource?Thanks,G
Hi All,I have an application that reads data from a very slow database link(like 10 seconds per call) though what I am looking for would be ofgeneric use for anyone who has long-running queries that arefrequently repeated.I would like to be able to cache the results of a query so that I donot have to re-execute that query if it is reissued. Ideally Ibelieve that this could be implemented by hiding the query inside aUDF and exposing the UDF through a view. The UDF could then "Checkthe cache" and only run the slow query if there wasn't a match (or ifthe match was too old). From what I understand the best way to dothis would be for the cache to be an extended stored procedure.Has anyone done or seen this? Has someone written a copy that Icould purchase? Does anyone care to offer their opinnion of how or ifthis could work?Thanks in Advance,Steven
Okay, I used the SQLDataSource control to get my data from the database table. What or how do I retrieve individual data from the sqldatasource? I want to do some string comparison and manipulation before I display it to the browser. How can this be accomplish?
Hello all,I have what I think should be a simple problem to solve but I just don't quite understand what to do (.NET Framework Developer Center confused me :( ).My code should load the highest SiteID, known as Last_ID into the siteIdBox when the form is in insert mode. My difficulty is in understanding how to use the sqlDataSource correctly. Dim dsLastId As New SqlDataSource() Dim siteIdBox As TextBox Dim dsmLastId As SqlDataSourceMode If FV_Site.CurrentMode = FormViewMode.Insert Then Try dsLastId.ConnectionString = ConfigurationManager.ConnectionStrings("AquaConnectionString1").ToString dsLastId.SelectCommandType = SqlDataSourceCommandType.Text dsLastId.SelectCommand = "SELECT MAX(Site_ID) AS Last_ID FROM Tbl_Site"
dsmLastId = SqlDataSourceMode.DataReader
siteIdBox.Text = dsmLastId.?????
Finally dsLastId = Nothing End Try End If If anyone could tell me the code for getting the value from the select statement into the textbox, I would be most grateful.Thank you, m00sie.
I have a process that inserts a new record using the InsertCommand of a SqlDataSource. As part of the process, I need to insert data the is available in a different SqlDataSource. I was trying this with the Insert Parameter:
[I am new to asp.net] Assume I have a databse for "products"; product id is a primary key. Here is what I am trying to: 1. DetailsView for a product (eg id = 1110) (I got this far) 2. how can I list other products starting with 111x id 3. I also to show them on same page as 1110 as "parent" 111x as children Thanks,
Background:I am using Visual Studio 2005 Standard SP1 to create an ASP.NET website that accesses an SQL 2005 database. I am using vb.net as well.I am passing an ID in a query string from one page to the next, where I retrieve it using an SQLDataSource. The data will only be one row; it is returning customer information.Problem:I need to be able to get specific fields from the SQLDataSource and populate some textboxes. Honestly, I'm not really sure where to begin. For the sake of argument, let's say that I am working with this:'My TextboxDim LastName As Textbox'My SQLDataSource (filtered by query string using the customer's ID to only get 1 customer's information at a time)SQLDataQuestion:So, how would I go about retrieving the lastname field from SQLData and inserting it into the textbox LastName?Thanks, J'Tok
1st of all i'm using 3.5 and c#. On my page I have 2 sqldatasource controls. sds1 and sds2 In my select statement of sds2 how do I make a select parameter based on a value or column I return from sds1? And please don't tell me to join my sds2 select in sds1, I don't want to do that. I need two seperate sds.
I am using a drap and drop SQLDataSource control. Everything works like I am wanting it to, but I want to check a value from one of the fields that I have retrieved. I am lost as how to retreive just the field. If I have to create another dataset to do the work what is the point of using the drag and drop control? I would really like to just access the dataset fields as needed.
Hello...Can someone help me?I´m getting info of a product via sqldatasource in this way:<asp:SqlDataSource ID="myData" runat="server" ConnectionString="..." SelectCommand="spGetProduct" SelectCommandType="StoredProcedure"> <SelectParameters> <asp:QueryStringParameter Name="Id" QueryStringField="Id" Type="String" /> </SelectParameters></asp:SqlDataSource>In my ASPX page I get the data in this way:<asp:Repeater ID="repProduct" runat="server" DataSourceID="myData"> <ItemTemplate> <p><%# Eval ( "ProductName") %></p> </ItemTemplate></asp:Repeater> My problem is in my code behind because I need some data from this DataSource.For example, I want the Product Name as the page title. So the question is how I get something like this in my code behind:protected void Page_Load ( object sender, EventArgs e ){ this.Page.Title = Eval ( "ProductName") ;}Thanks!
Hi, I don't know if i's a silly question. Now I want to get data from sqldatasource by only write some code,I don't know without creat some data control components if it can be true? If it can do,how can I write the codes? Especially I don't know how to write the code witch can "read" data.
In asp.net 3.5..... To get the number of rows returned when the select is executed....... Protected Sub SqlDataSource1_Selected(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceStatusEventArgs) Handles SqlDataSource1.Selected Session("MessageText") = e.AffectedRows & " Profile(s)"End Sub How do you get the number of rows returned when you apply a filter expression to a selection of rows? Thanks Craig
hi,im just a newbie in asp.net.i have my sqldatasource and a label. i want to get the data from sqldatasource to the label. how can i do that.need codes
I am just now starting the switch from .NET 1.1 to .NET 2.0. I really like the new way of using the SQLDataSource and setting up Views declaratively as opposed to doing it all in code, which brings me to my question.In some of my applications I have a single Stored Procedure return multiple result sets to a single DataSet where I have a DataRelation set up. Then I can have nested DataGrids that use the GetChildRows() method to filter the results to display the hierarchical data. I would like to do something similar with the SQLDataSource and GridViews but haven't found a way to get multiple result sets.One thought I had was to create a Strongly Typed Dataset and then use the ObjectDataSource object, but I still didn't see a way to get child rows out of the datasource. I've seen an example that uses a <FilterParameter> to get nested data, but there is an extra trip made to the server for each parent item as it just put an extra parameter in the WHERE clause of the query.
I have a sqldatasource in the markup. This is in turn connected to a Gridview. I use Eval to retrieve the database information in the markup but I also need the Eval information in code behind. How can I do this? I got this far but how (if it's possible this way) can I retrive it? Protected Sub Test(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound If (e.Row.RowType = DataControlRowType.DataRow) Then this is where i want to get the "MyData" value from the database. End If ........
Hi Expert, Am I doing it right? Can you give me any suggestions please? Thank you!!I followed the way for setting up the sql cache dependency from http://quickstarts.asp.net/QuickStartv20/aspnet/doc/caching/SQLInvalidation.aspx.However, I still have the following error: When using SqlDependency without providing an options value, SqlDependency.Start() must be called prior to execution of a command added to the SqlDependency instance. IssueSummary.aspx<%@ Page Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="IssueSummary.aspx.vb" Inherits="IssueSummary" title="Issue Summary" %><%@ Register Assembly="AtlasControlToolkit" Namespace="AtlasControlToolkit" TagPrefix="cc2" %><%@ Register Assembly="Microsoft.Web.Atlas" Namespace="Microsoft.Web.UI" TagPrefix="cc1" %><%@ OutputCache Duration="999999" VaryByParam="None" SqlDependency="CommandNotification" %> Global.asaxSub Application_Start(ByVal sender As Object, ByVal e As EventArgs)Dim connectionString As String = ConfigurationManager.ConnectionStrings("ICTConnectionString").ConnectionStringDim needToInstall As Boolean = TrueTryDim tables() As Stringtables = SqlCacheDependencyAdmin.GetTablesEnabledForNotifications(connectionString)If (Not tables Is Nothing) ThenDim tbl As StringFor Each tbl In tablesIf (tbl.ToLower().Equals("IssueDetails")) ThenneedToInstall = FalseEnd IfNextEnd IfCatch ex As ExceptionneedToInstall = TrueEnd TryIf (needToInstall) ThenSqlCacheDependencyAdmin.EnableNotifications(connectionString)SqlCacheDependencyAdmin.EnableTableForNotifications(connectionString, "IssueDetails")End IfEnd Sub Web.config<connectionStrings><add name="ICTConnectionString" connectionString="Data Source=jamesle-3;Initial Catalog=IssueCommunicationTool;Integrated Security=True" providerName="System.Data.SqlClient"/></connectionStrings><system.web><caching><sqlCacheDependency enabled="true" pollTime="1000" ><databases><add name="ICTDB" connectionStringName="ICTConnectionString" /></databases></sqlCacheDependency></caching> SQL Server 2005 - Database - IssueCommunicationToolSELECT is_broker_enabled FROM sys.databases WHERE name = 'IssueCommunicationTool' Return = 1, it means the broker service is enabled. Also, the database has created the table ASPNET_SQLCacheTableForChangeNotification, the trigger in IssueDetails table, and some other store procedures.
Hello, I have caching enabled in my application and I am using SqlCacheDependency to cache my tables. Well, the cache works fine but when the table is updated the information in my cache does not update. I DO have the broker service started and running but not sure what else i am missing. I am using sql server 2005.
Hi, I'm trying to set up a SqlCacheDependency using the Query notifications of SQL Server 2005. I haven't even got to the point of testing the notifications part. My problem is that my DataTable is not even getting stored in the cache when I insert it. The cache seems to be getting invalided as soon as I add the DataTable. Here is my code: (am trying to get a simple example working first)protected void Page_Load(object sender, EventArgs e) { DataTable results = (DataTable)HttpRuntime.Cache.Get("supplyFunctions"); if (results == null) { Response.Write("Cache Invalidated, hitting DB. TIME: " + DateTime.Now.ToString()); results = getSupplyFunctions(); } else { Response.Write("got from Cache, TIME: " + DateTime.Now); } GridView1.DataSource = results; GridView1.DataBind(); }private DataTable getSupplyFunctions() { DataTable results = new DataTable(); using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ToString()) ) { using (SqlCommand command = connection.CreateCommand()) { command.CommandText = "schema.myStoredProc"; command.CommandType = CommandType.StoredProcedure; SqlCacheDependency dependency = new SqlCacheDependency(command); SqlDataAdapter adapter = new SqlDataAdapter(); adapter.SelectCommand = command; DataSet dataset = new DataSet(); adapter.Fill(dataset); results = dataset.Tables[0]; HttpRuntime.Cache.Insert("supplyFunctions", results, dependency); }
} return results; } Also, whats weird is that when I keep refreshing the page, after like 5 to 10 minutes it works, and starts caching the data. This disturbs me-- I would like to know what is going on. I am pretty sure my stored procedure doesn't break the rules of the query notifications. Can someone help me out?!??! Thanks!
I have a page in my website that pulls content for a newsletter from a SQL Server 2000 database using a SqlDataSource and a FormView. I add a new newsletter every week. Other than that weekly addition, no changes are really ever needed or made to the data. Scott Gu says every application can and should make use of caching and I would like to add some kind of caching to improve the performance of this page. I have read about SqlCacheDependency with SQL 2000, but if I understand it correctly, it will poll the database for changes every x seconds, an expensive operation that I just don’t need; the data only changes once a week. I’ve seen some code examples using DataSets and the Cache API but I’m really just looking for a simple, mostly declarative solution using the SqlDataSource. Theoretically, I would like the data cached forever until I insert a new item. I have set the following cache-related properties on my SqlDataSource as follows:
Setting these properties seems to work great for caching the data but how do I programmatically invalidate the cache when a new item is inserted? I have a separate admin page with a FormView that I use to insert the newsletter each week. Is there some kind of code that I could put in the ItemInserted event that would invalidate the cache so that the new item will be displayed and then cached? I don't have any experience with caching; where am I going wrong? Are my expectations unrealistic? Thank you in advance to anyone who can shed some light on this issue.
I've recently deployed an ASP.Net application, with admittedly not a lot of experience with SQL Server 2005 caching.A problem that I ran into is a user searching for a case number very soon after entering it, and it not showing up. However, after a few minutes and re-running the search it appeared.I'm guessing that this is a SQL Server caching issue, but I'm not sure what to do about it.On my search screen, I have a listview for the results, a textbox for the case # input, a button and a sqldatasource. The SqlDataSource uses a select statement, and two parameters for user(ensure the case belongs to that user) and casenumber. The SqlDataSource has enablecaching set to false. Any ideas what I can do about this issue? Also, any good places I can read about sql server caching? Thanks
I'm trying to performance tune a procedure and am sort of being thwarted by caching.
When I first run the procedure, it takes a few seconds which is too long in this case. Subsequent executions in Management Studio are nearly instantaneous, though, which I imagine is due to caching and does not reflect the behavior of the procedure in production.
Is there a way to disable caching so that each execution of the procedure in Management Studio will be consistent and reflect the "first run" performance?
