DataSource Controls :: Get Profiles From Timestamp - 20 Seconds?
Mar 17, 2010
I have a issue im trying to get though where my site while up useing a ajax timer ever 15 seconds to update there time stamp to say there still online and active. Its the best way i could think of to handle the are they online/did they just leave issue i was having. Any ways i dont know how to query the database with linq to sql so i guess i will do psudeo code like stuff and hopefully some one can offer some advice.
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Jan 16, 2010
I would like to know what does a field timestamp in MSSQL do?I have read a book "ASP_NET_3_5_Social_Networking" and almost all the tabels have a columnt with type "timestamp" in their example app.What is the benefit of timestamp , and why should i use it?
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Mar 29, 2010
I added a column of type "timestamp" to a table in SQL Server to use for concurrency control. I deleted all my tables from the Linq surface and then added them back. I see that the "Time Stamp" attribute is set to True for the timestamp column and False for all the other columns. I also see that the "Update Check" attribute is set to Never for all columns, including the timestamp column.
After watching some demo videos and reading some tutorials, I had expected to have to manually set the "Update Check" attribute values on the columns - to Never for all columns but the timestamnp column where it should be set to Always. But, before setting the "Update Check" to Always on the timestamp column, I decided to test it the way it was, and Linq seems to be doing the right thing - it seems to be using the timestamp column for concurrency control correctly even with "Update Check" set to Never on the timestamp column.
So my question is - does the fact that "Time Stamp" is set to True trump the "Update Check"? Or is there any other reason one could or should set "Update Check" to Always on a timestamp column? Is there any change in behavior?
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May 20, 2010
I have a big probelm that i want to use profiles at godaddy hosting , it didn't work good and make a message said :
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
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Apr 16, 2010
I use a SqlDataReader to get fron sqlServer a row af a table. This table have a text field where I store a Xml configuration. In one case this Xml grow up to 650Kb. When I get the field from the datareader it cost amost 2 seconds:
INFO 2010-04-16 09:46:40,559 [12] Cms.dataContenido - readed
INFO 2010-04-16 09:46:42,356 [12] Cms.dataContenido - XMLContent
This is my code:
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Feb 4, 2010
I'm developing a web application with ASP.net and Sql Server 2005.
How i can retrive data from database on every seconds basis?
For your information , I have a Server application which will update hardware status (every seconds) into database and
my web client need to retrieve and display out the latest status (every seconds)
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Nov 4, 2010
I have a SQL table containing a timestamp column. This table is displayed in ASP using GridView control. The timestamp column is indicated in the DataKeyNames property of the GridView. I'm using TemplateFields for all columns and a ItemTemplate HiddenField control connected to the timestamp column using Eval.
<asp:TemplateField
ItemStyle-Wrap="false"
Visible="false"
HeaderText="timestamp"
SortExpression="timestamp">
<ItemTemplate>
<asp:HiddenField
ID="gv_hid_timestamp"
runat="server"
Value='<%#
Eval("timestamp") %>'
></asp:HiddenField>
</ItemTemplate>
</asp:TemplateField>
The data is displayed properly. I'm trying implement the optimistic concurrency in C# using the value of above mentioned timestamp and a stored procedure. The SQL stored procedure expects the @timestamp as varbinary(8). I'm not sure how to pass the value of gv_hid_timestamp back to the stored procedure. I'm using the following:
command.Parameters.Add("@timestamp", SqlDbType.Binary).Value = Byte.Parse(((HiddenField)gv.Rows[row].FindControl("gv_hid_timestamp")).Value);
resulting in the following error: "Input string was not in correct format." (I also tried different data types but with similar result). I want to be able to pass this parameter programmatically from C# and not have to specify it on the UpdateParameters list.
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Oct 12, 2010
I am trying to populate a gridview control to display the current registered users on the site.
I query various tables from the ASPDOTNET.mdb database in order have a list comprising of UserNames, Email address, LastLoggedOn, etc. This bit is fine and it displays all the details.
The part I'm having a problem with, is I would like to add the FirstName and LastName to each row also. But I'm not sure how to get at the record. In the profile table I have a column with this detail within plus other personal details but I only need to retrieve the names and display that in the gridview.
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May 21, 2010
I have stored users external profiles e.g twitter,facebook,youtube... in DB
And what i want to do is to show those profiles in form of hyperlink field in gridview..
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Mar 16, 2010
What is the use of timestamp? where should i use this?
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Mar 21, 2011
what the equivalent datatype of sql server timestamp in VB.NET,and How to retrive the exact value of timestamp from sql server in vb.net.?
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Jan 8, 2010
At the first loading of my page, duration of PreRender takes upto 13 seconds. That page has basically a gridview control which bind to SqlServer query by SqlDataSource. When I execute query seperately, it takes only 0.02 second.
On the other hand, for the next loadings of same page by postback, duration of PreRender varies from 0.5 second to 3-4 seconds.
In addition to gridview, there are several dropdownlist, update panel, ImageButton in gridview. I use paging for Gridview.
Which strategy should i follow to increase performance of this page?
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Mar 25, 2011
I have a web page that has a textbox for users to enter a datestring to check against a database. The database that I am running my query against has datetime values set at minutes since 12/31/1899 and that returns a timestamp. What I'd like to do in my code is to convert my textbox entry into minutes since 12/31/1899. Does anyone have an easy way to do that?
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Mar 9, 2011
I have a column in my table that is named 'startDateTime' and 'endDateTime'. I need to select all the rows where current time stamp is in between the startdatetime and enddatetime. Note that the datatype is smalldatetime. How to do this?
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Jan 25, 2010
I have created a dynamic data-driven report delivery by email in Reporting Services 2005. The report will be attached as PDF format. I can add the execution time stamp (@ExecutionTime) to the subject and comment lines. However, I cannot find a way to append the timestamp to the report name.
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Oct 18, 2010
For example:
Dim testdate As String = "29/10/2010"
testdate = Convert.ToDateTime(testdate.ToString)
Response.Write(testdate)
expecting "29/10/2010 00:00:00" what I get is "29/10/2010"
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May 7, 2015
I had implemented the Ajax timer control to update Gridview data(along with Progress bar inside Gridview) after some interval of time.Below is the full code:
HMTL:
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
<%--style & Script for progress bar in Gridview --%>
<script type="text/javascript" src="//code.jquery.com/jquery-1.10.2.js"></script>
<script type="text/javascript" src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<link href="css/jquery-ui.css" rel="stylesheet" />
[Code] ....
C#:
protected void Page_Load(object sender, EventArgs e) {
if (!this.IsPostBack) {
BindGrid();
} }
protected void BindGrid() {
string query = "SELECT * FROM Table";
[Code] ....
It is working fine except that the Gridview paging is taking some time(15-20 seconds) to go to next page.
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Dec 9, 2010
I have a column (data type timestamp) in SQL Server 2008.Now I want to show this timestamp value in ASP.Net C# app as string. Is there any way to do that?I tried it using regular data fetching in ASP.Net but it produced System.byte[] as output rather than actual value. In SQL Server Management Studio values are represented as 0x000000000000B3C0
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Feb 12, 2011
I was following a MSDN walkthrough [URL] which is a very simple ASP.NET example with Visual Studio 2010:
·
I have a simple database table with a timestamp column;
·
I created a "Linq to SQL Class", and drag the table from Server Explorer onto it;
·
I dragged a LinqDataSource onto the web page and pointed it to the dbml;
·
I dragged a DetailsView onto the web page using the LinqDataSource.
·
I enabled editing on the data source.
When I run, the time stamp column is also displayed on the DetailsView as something like "AAAAAAAAB9Y=". Then, when I change the "EmployeeName" and update, I got following exception: Failed to set one or more properties on type person. Cannot convert value of parameter 'tstamp' from 'System.String' to 'System.Data.Linq.Binary'. I was strictly following the MSDN walkthrough. I tried multiple times, I even installed Visual Studio 2010 SP1 Beta. But it consistently through this exception. Can someone shed some light on this? Not a encouraging start form someone thinking to learn the lastest Microsoft stuff!
I was following a MSDN walkthrough, which is a very simple ASP.NET website with Visual Studio 2010: I have a simple database table with a timestamp column;I created a "Linq to SQL Class", and drag the table from Server Explorer onto it;I dragged a LinqDataSource onto the web page and pointed it to the dbml;I dragged a DetailsView onto the web page using the LinqDataSource.I enabled editing on the data source.When I run, the time stamp column is also displayed on the DetailsView as something like "AAAAAAAAB9Y=".Then, when I change the "EmployeeName" and update, I got following exception: Failed to set one or more properties on type person. Cannot convert value of parameter 'tstamp' from 'System.String' to 'System.Data.Linq.Binary'. I was strictly following the MSDN walkthrough. Can someone shed some light on this? Not a encouraging start form someone thinking to learn the lastest Microsoft stuff!dfsaf
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Feb 8, 2010
I'm making a simple forum using MySQL and I use a repeater to display a list of all threads in it. I have two tables for posts, one for threads and one for replies, and I want to sort the threads by either when they were posted or when the last reply was posted in it. My SQL query is really long and hard to read so here's some psuedo code similar to it (easier to understand these column names, etc):
SELECT
threads.id,
threads.title,
threads.timestamp,
users.username,
(SELECT COUNT(*) FROM replies WHERE thread_id = threads.id) AS number_of_replies,
(SELECT COUNT(*) FROM views WHERE thread_id = threads.id) AS number_of_views,
(SELECT timestamp FROM replies WHERE thread_id = threads.id ORDER BY timestamp DESC LIMIT 1) AS last_reply_timestamp
FROM threads
LEFT JOIN users
ON threads.user_id = users.id
ORDER BY ************** DESC
What I do here is I fetch the values id, title, timestamp, the author's username, the number of replies and views for a specific thread, and I also get the timestamp for the last reply to this thread.
Then, what I want to do is sort the whole list so that the threads are displayed in an order matching when either it was posted or the last reply was posted in it (you know, like a normal forum) but I'm not sure how to accomplish this.
I tried this:
ORDER BY CASE WHEN last_reply_timestamp > threads.timestamp THEN last_reply_timestamp ELSE threads.timestamp END DESC
but that, I guess, maybe only looks at the first row and determines which one should be used so the order is not correct.
I'm not sure if it's possible to create a sort of variable that holds the value for each row of the timestamp that applies, if that's possible you could sort by that. For example:
(CASE WHEN last_reply_timestamp > threads.timestamp THEN last_reply_timestamp ELSE threads.timestamp END) AS last_activity_timestamp
...
ORDER BY last_activity_timestamp DESC
So each row has a field "last_activity_timestamp" containing either timestamp, whichever is the later than the other.
Can this be done somehow? How does everyone else solve this? It's so hard to search google because I just get lots of forums but no code.
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Oct 25, 2010
I am using SQLCMD to execute a script and then output the results to a csv file. Is it possible to name the output file with a timestamp each interval that it is executed (such as every 30 minutes that the command is executed to timestamp like "output 10/25/10 830.csv"?
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Dec 1, 2010
I have a question about lists. So let say i have a list with 2000 objects, object has a text and a timestamp. So i want to return the list and i wan to only show text which timestamp is > or < then datetime.now, that is example, yeah, so how should i do it better, faster? Ofc i can make another newList and then just circle tru the list and add to newly created list(newList) the items that i want to show, comparing the items timestamp, but it might take too much time and resources, is there an easier way? Cuz that list with 2000 objects can become bigger after some time.
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Oct 21, 2010
I have a Timestamp column in my Table. I want to read the date time value and display in UI.
In Linq the Timestamp column is represented as System.Data.Linq.Binary.
I dont know how to retirve date time value in "MM-dd-YYYY" format from this Linq.Binary
- Why I am using Timestamp?.
I want to perform some operations based on the last modified date time of the particular row. Since I am using TimeStamp column in my Table as version column, It will contain the last modified date details, So i want to read the date time value from this time stamp column to do some other operations.
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Mar 24, 2011
I am using VWD 2010 and building a site on the 3.5 framework. It's a simple site for a school club, and we need user profiles for membership information. I have been looking at This MSDN page about how to go about it. This is my current Web.config:
Code:
<authentication mode="Forms">
<forms loginUrl="~/Account/Login.aspx" timeout="2880"/>
</authentication>
<membership>
<providers>
<clear/>
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
</providers>
</membership>
<profile enabled="true" defaultProvider="AspNetSqlProfileProvider">
<providers>
<clear/>
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
</providers>
<properties>
<add name="Name" type="String" serializeAs="String"/>
<add name="Address" type="String" serializeAs="String"/>
</properties>
</profile>
<roleManager enabled="true">
<providers>
<clear/>
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
</providers>
</roleManager>
It is more or less out of the box currently. The issue I am having is that if I try to access say, Profile.Name, I get the error that "Name" is not a member of "Profile". I have had this working before in another site, but this one is getting the better of me.what I may need to do to get this functioning properly?
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Feb 9, 2011
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I get the following error : The SSE Provider did not find the database file specified in the connection string. At the configured trust level (below High trust level), the SSE provider can not automatically create the database file.
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