Is there any difference in performance between a SqlDataSource and an
ObjectDataSource - assuming they are being deployed to perform the same
task against a SQL Server database?
More
specifically, will the use of the SqlDataSource in itself lead to
scalability issues at some stage that the ObjectDataSource wouldn't? Or is use of the SqlDataSource discouraged purely for design/architectural reasons (eg 2-Layer == Bad : 3+ Layer == Good)?
I'm using visual basic coded datasets right now, and caching them, so as all of my web app users access the cache once the first person's gone to my site and initiallized the page.
If Cache("ds_cache") Is Nothing Then
Dim ds As New DataSet
blah blah code blah blah blah
Cache.Insert("ds_cache", ds)
End If
What I was wondering is, if it's possible to cache the datasets that get created and are used by Sqldatasources. Or if by chance caching is automatically done and controlled for these datasets, as it's the server that makes and handles them.
The reason I wonder about this because I'm not sure how you go about referencing one of those datasets, because you can't give them a name/id. And I've not found mention anywhere of you being able to do so.
The real point or question I'm trying to get at is to see which performs better , or uses less requests back to the server for the data as a lot of my data will be repeatedly used by all of my users and so I'd like to save myself from using as many repeated connections as possibles in regards to using a typed dataset versus filling my controls from a sqldatasource?
Thank you in advance for your response.
There are so many ways to use database in asp.net/ado.net, I'm a bit confused about their difference from the performance point of view.So apparently SqlDataSource in DataReader mode is faster than DataSet mode, at a cost of losing some bolt-on builtin functions.What about SqlDataSource in DataReader mode vs manual binding in code? Say creating a SqlDataSource ds1 and set "DataSourceID" in Gridview, vs manually creating the SqlConnection, SqlCommand, SqlDataReader objects and mannually bind the myReader object to the gridview with the Bind() method.Also Gridview is a very convenient control for many basic tasks. But for more complex scenarios it requires lots of customization and modification. Now if I do not use gridview at all and build the entire thing from scratch with basic web controls such as table and label controls, and mannually read and display everything from a DataReader object, how's the performance would be like compared to the Gridview-databind route?
View 3 Replies View RelatedWhat is the C# code I use to do this?
I'm guessing it should be fairly simple, as there is only one row selected. I just need to pull out a specific field from that row and then insert that value into a different SqlDataSource.
i am using visual web developer 2005 with SQL Express 2005 with VB as the code behindi have one database and three tables in itfor manipulating each table i am using separate SqlDataSource() is it sufficient to use one SqlDataSource() for manipulating all the three tables ? i am manipulating all the tables in the same page only please help me
View 1 Replies View Related1. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection
above, which way would be faster and get a better performance?
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***
View 2 Replies View RelatedHello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server witha particular query. It would take approximately 22 seconds to return100 rows, thats about 0.22 seconds per row. Note: I ran the query insingle user mode. So I tested the query on the Development server bytaking a backup (.dmp) of the database and moving it onto the devserver. I ran the same query and found that it ran in less than asecond.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue isrelated to some external hardware issue like: disk space, memory etc.Or could it be OS software related issues, like service packs, SQLServer configuations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating systemrelated issue.Any Ideas would help me greatly!Thanks,Brian T
View 2 Replies View RelatedI have an asp:sqldatasource which is bound to a gridviewIn addition to this I would like it to a) see if there is a specif row/ item in it (ie item_id = 10 for any of the rows it has received) as I conditionally want to show another item outside of the gridview subject to if it is in the gridview or notb) show the sum of all the values within a certain column of returned rowsMany thanks
View 1 Replies View RelatedHow do I get the result of this select into a variableDim sqldsFindUserId As SqlDataSource = New SqlDataSource sqldsFindUserId.ConnectionString = ConfigurationManager.ConnectionStrings("bluConnectionString2").ToString sqldsFindUserId.SelectCommandType = SqlDataSourceCommandType.Text Dim myUserIdCmd As String = "select pkUser from tblUsers where strDisplayName='" + myDisplayname + "" sqldsFindUserId.SelectCommand = myUserIdCmd ' The result of this select statement is to be stored in a variable, how do I do it?
View 2 Replies View RelatedHi all
View 2 Replies View Relatedhi all,
in all my 2.0 learnings and books i keep coming across the page element <asp:sqldatasource>.
I have always (in 1.1) used server side connections and adapters to bind my Sql datasets to any control needed. Now that im learning 2.0 im finding it difficult to understand using control on the page to bind my data. Can someone explain the benefits of using this data source? Ideally i would like to keep my data access layer separate from my presentation layer but i'd really like to understand why this method seems so popular.
thanks in advance,
mcm
Hi, I am new to ASP.NET 2.0 and I am trying to use VWB to bind my web site to a SQL Express edition. I used SQLDataSource to specify the .mdf file so I can connect to my tables but when I click on the advanced button to generate the Insert, Update, Delete SQL I find it grayed out and it cannot be clicked. I looked into several tutorials online and I couldn't find the problem, can anyone explain what I am missing or doing wrong? Any suggestion is very appreciated. Thanks
View 2 Replies View RelatedSELECT * FROM [CONTACTS] WHERE @ddl_value LIKE '%@txt_value%'
Why doesn't this not working
I am using SQLdatasource control to bind a gridview
If my query is wrong then what might be the correct one to work with like operator in the sqldatasource
Can any ony help me!
Hello All,
I have quick question ..
In my aspx page i have gridview and Sql DataSource object as you can see
<asp:sqldatasource id="SqlDataSource1" runat="server" ></asp:sqldatasource>
<asp:gridview id="GridView1" runat="server" allowpaging="True" allowsorting="True" autogeneratecolumns="False" datasourceid="SqlDataSource1">
<columns>
<asp:boundfield datafield="breakdownid" headertext="breakdownid" insertvisible="False"
readonly="True" sortexpression="breakdownid" />
<asp:boundfield datafield="ticketno" headertext="ticketno" sortexpression="ticketno" />
<asp:boundfield datafield="systemtype" headertext="systemtype" sortexpression="systemtype" />
<asp:boundfield datafield="break_date" headertext="break_date" readonly="True" sortexpression="break_date" />
<asp:boundfield datafield="subject" headertext="subject" sortexpression="subject" />
<asp:boundfield datafield="status" headertext="status" sortexpression="status" />
<asp:boundfield datafield="prioritylevel" headertext="prioritylevel" sortexpression="prioritylevel" />
<asp:boundfield datafield="mobiletype" headertext="mobiletype" sortexpression="mobiletype" />
</columns>
</asp:gridview>
In codebehind file i call a function to get data from database. what i want is to bind the result to the sqlDataSourse not the gridview.
I need to have the SqlDataSourse thier.. Any help please
Sub Page_load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
Dim objReader As New Dynamic.Reportsdemo
SqlDataSource1 = .objReader.Get_Tickets(1, 0, "all")
SqlDataSource1.DataBind()
objReader.objconnection.Close()
End If
End Sub
Thanks.
Hi!Please tell me, how to get a simple value using SQLDataSource, I mean a number, or char, or string - any value, NOT DataTable
View 3 Replies View RelatedI am trying to get record from a table and verify it with a textbox i have a sqldatasource.
i have a text box called txtEmail and this is my Select command. how can i get this working if its possible ?
something like txtEmail.text = SqlDataSource1.Secect then ... my code. (i dont know if this a correct way to do this)
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:imacstestConnectionString %>"
SelectCommand="SELECT FROM [t_CustomerAcct]"
thanks,
hi all,i am using sqldatasource for gridviewso that i can edit and update any row at the same place ..... and not to write any code for that....now later on if i wanna change the selectcommand of that sqldatasource how can i ? so that the edit and update will be same as it was....
View 2 Replies View RelatedHi,
I'm trying to go through a checkbox list and inserting them into a database using a sqldatasource with the following code:For Each li As ListItem In Locations_Checkbox.Items
If li.Selected = True Then
Dim DataSource2 As SqlDataSource = CType(InsertProgrammeLocations, SqlDataSource) DataSource2.InsertParameters.Add("ProgrammeID", li.Value)
DataSource2.Insert()
End If
Next
When more than one checkbox is ticked, I'm getting the error 'The variable name '@ProgrammeID' has already been declared'. How do I close or reset my Datasource before I try and use it again?
Thanks for your help
please explain selectparameter collection and conflict detection property and filterparameter
mohsen
Hi, I want to know when to use an sqlDataSource object because I used to populate for example a listBox control in visual studio net 2003 from AQLK server database by using a connection object, command object, dataAdapter object and a DataSet object. I discovered if I use sqlDataSource object (using visual studio net 2005) ,all I need is to write the connection string and a Select statement as properties for that sqlDataSource, so why to use the above mentioned objects(connection,command,adapter,dataset) while I can access any database in sql server through the use of sqlDataSource?
I appreciate if you can explain to me the difference and when to use an sqlDataSource
thx
How can I update more than one table with one UpdateString in SqlDataSource?
View 5 Replies View RelatedHi,
I have an application w/ n-tier design so I've never used the SqlDataSource up to this point but having to do my own sorting for GridViews is not something I want to keep dealing with. I'd like to take advantage of some of the packaged features too.
My question is: are there any purists out there who opted to use SqlDataSource. If so, what do you think about it? It's nice that SqlDataSource makes things simple but having data classes and dealing w/ exceptions in those classes certainly make an application pretty robust. Should I entertain the idea of using SqlDataSource or stay as a purist and keep doing things the old fashioned way?
How to display returned data from sqldatasurce in a textbox.
This code is not working TextBox1.Text = SqlDataSource2.ToString(); Thanks Lot.
Hey all,I've just started to use asp.net and so far have found it fairly easy. The only problem I've come across is with putting variable clauses into the SqlDataSources.This is one example of what I've done trying to get this to work. <asp:SqlDataSource ID="ClaimsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>"
SelectCommand="SELECT TOP 20 dbo_ClaimStatus.ClaimStatus, dbo_CLAIMS.PACKET, dbo_INSURED.NAME, dbo_FEES.INSURER, dbo_FEES.CLAIM_NUMBER, dbo_CLAIMS.LOSS_DATE, dbo_CLAIMS.RECEIVED, dbo_CLAIMS.LOSS_LOCATION, dbo_CLAIM_TYPES.CODE FROM ( ( ( ( dbo_CLAIMS INNER JOIN dbo_CLAIM_TYPES ON dbo_CLAIMS.CLAIM_TYPE = dbo_CLAIM_TYPES.CODE ) INNER JOIN dbo_ClaimStatus ON dbo_CLAIMS.StatusID = dbo_ClaimStatus.ClaimStatusID ) INNER JOIN dbo_FEES ON dbo_CLAIMS.PACKET = dbo_FEES.PACKET ) INNER JOIN dbo_INSURED ON dbo_CLAIMS.PACKET = dbo_INSURED.PACKET ) WHERE dbo_ClaimStatus.ClaimStatus = @claimStatus"> <FilterParameters> <asp:QueryStringParameter Name="claimStatus" QueryStringField="ctl00$MainContent$claimStatus" /> </FilterParameters></asp:SqlDataSource>I'm posting claimStatus from a previous page using PostBackUrl on an <asp:Button /> tag and claimStatus is an <asp:DropDownList /> tag.Any idea's as to why this doesn't work?Nalum
Dear Friends in my project , i' ve used two SqlDataSource, one button and one gridview control;
the process that i want to do is when i click the button control ,according the if structure in this button control ; one of the SqlDataSource control assign to the gridview control DataSource property (but i assign the DataSourceID property for the gridview , it runs);
but i couldnt do it, what can i do for it? (my code doesnt give any errors but doesnt do anything too)
my code is here;
protected void btnSearch_Click(object sender, EventArgs e) { if (txtSearch.Text != null){ SqlDataSource3.SelectParameter["key"].DefaultValue = txtsearch.Text; Gridview1.DataSource = SqlDataSource3; GridView1.DataBind(); } else { SqlDataSource1.SelectParameters["keySession"].DefaultValue = cbSession.SelectedItem.ToString(); SqlDataSource1.SelectParameters["keyClass"].DefaultValue = cbClass.SelectedItem.ToString(); SqlDataSource1.SelectParameters["keyUnit"].DefaultValue = cbUnit.SelectedItem.ToString(); Gridview2.DataSource = SqlDataSource1; GridView2.DataBind(); }
Dear Friends in my project , i' ve used two SqlDataSource, one button and one gridview control;
the process that i want to do is when i click the button control ,according the if structure in this button control ; one of the SqlDataSource control assign to the gridview control DataSource property (but i assign the DataSourceID property for the gridview , it runs);
but i couldnt do it, what can i do for it? (my code doesnt give any errors but doesnt do anything too)
my code is here;
protected void btnSearch_Click(object sender, EventArgs e) { if (txtSearch.Text != null){ SqlDataSource3.SelectParameter["key"].DefaultValue = txtsearch.Text; Gridview1.DataSource = SqlDataSource3; GridView1.DataBind(); } else { SqlDataSource1.SelectParameters["keySession"].DefaultValue = cbSession.SelectedItem.ToString(); SqlDataSource1.SelectParameters["keyClass"].DefaultValue = cbClass.SelectedItem.ToString(); SqlDataSource1.SelectParameters["keyUnit"].DefaultValue = cbUnit.SelectedItem.ToString(); Gridview1.DataSource = SqlDataSource1; GridView1.DataBind(); } }
Could someone help me with syntax? Everything works until line 23. At that point, I get a NullReferenceException. When I examine the SqlDataSource object, everything inside reads "Object cannot be null" or "The pointer for this method was null." The SQLDataSource looks ok, just before executing line 23.
Does anyone have a complete example of how to do this ADO operation?
Thank you. 1 Dim fv As FormView = Nothing
2 Dim sds As New SqlDataSource
3
4 ' ===== Lookup connection string =====
5 sds.ConnectionString = ConfigurationManager.ConnectionStrings("LocalSQLServer").ToString
6
7 ' ===== Define command statements =====
8 cmdSelect = _
9 "SELECT rowid, FRScrnLev, FRPgmLev, " + _
10 "FRFName, FRLName, FRIDate, OverRide, OverRideDesc " + _
11 "FROM PSB_Pre WHERE PSBid = @PSBid"
12
13 ' ===== Get handle to Formview =====
14 fv = CType(MultiView1.Views(0).FindControl(ViewState(VS_VIEW).ToString), FormView)
15
16 ' ===== Complete definition of data source =====
17 sds.SelectCommand = cmdSelect
18 sds.SelectCommandType = SqlDataSourceCommandType.Text
19
20 sds.UpdateCommand = cmdUpdate
21 sds.UpdateCommandType = SqlDataSourceCommandType.Text
22
23 sds.SelectParameters("PSBid").DefaultValue = CP.PsbId
24
25 ' ===== Bind data source to FormView. =====
26 fv.DataSource = sds
27 fv.DataBind()
I have an sqldatasource that has a select statement and i just wanna pull a value out of it
a single value
row 0 colum 0
and assign it to a string
the coloum is an interger in the database
Hi, i am trying to use a sqldatasource to update a table and when i go and update the table it puts a null value in for all of my fields. I am not sure what is happening and i have never used on of these before. Is there some code that i need to write to accompany the sqldatasource or am i just missing something. I have posted the code below. Thanks.<asp:GridView ID="grdSize" runat="server" AutoGenerateColumns="False"
DataSourceID="sqlbk" Width="295px" BackColor="White" BorderColor="#999999"
BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical">
<FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
<RowStyle CssClass="grdsizerow" BackColor="#EEEEEE" ForeColor="Black" />
<EditRowStyle CssClass="grdsizeedit" />
<Columns>
<asp:CommandField ShowEditButton="True" />
<asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" />
<asp:TemplateField HeaderText="Diameter" SortExpression="Diameter">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" Width="60px" Height="16px" runat="server" Text='<%# Eval("Diameter") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Diameter") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="HighLimit" SortExpression="HighLimit">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" Width="60px" Height="16px" runat="server" Text='<%# Eval("HighLimit") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("HighLimit") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="LowLimit" SortExpression="LowLimit">
<EditItemTemplate>
<asp:TextBox ID="TextBox3" Width="60px" Height="16px" runat="server" Text='<%# Eval("LowLimit") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("LowLimit") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
<HeaderStyle CssClass="grdsizeheader" BackColor="#000084" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="#DCDCDC" />
</asp:GridView><asp:SqlDataSource ID="sqlbk" runat="server"
ConnectionString="<%$ ConnectionStrings:qdbConnectionString %>" SelectCommand="Select ID, screwdia as Diameter , HighLimit, LowLimit from ScrewSize"
UpdateCommand="UPDATE ScrewSize SET screwdia = @dia, HighLimit = @high, LowLimit = @low WHERE (ID = @ID)">
<UpdateParameters>
<asp:Parameter Name="dia" Type="String" />
<asp:Parameter Name="high" Type="String" />
<asp:Parameter Name="low" Type="String" />
<asp:Parameter Name="ID" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>
Hi
When i am configuring the SQLdatasource control the checkbox of Generate insert,updata and delete is disabled i wnat to check this checkbox
can anybody tell me how i enable this checkbox
thanks
Hello,What's the difference between using sqldatasource to get data vis-a-vis ado.net?Both can retrieve datareaders and datasets.Any thoughts? Which one is better?From my experience, code-wise, sqldatasource is muuuuch easier.a s a f. . .
View 1 Replies View RelatedI have my table on the page with data in it from my database but I can't see the SqlDataSource below it where it should be. Is something wrong with the program or is there a way to turn it on so I can see it?A quick response would be greatly appreciated.
View 2 Replies View Related