Forms Data Controls ::displaying Huge Data?
Apr 20, 2010
We have our web-based car tracking (gps) software developed in asp.net. We receive positional information every 30 seconds. Overall we get millions of records everyday. We have a historical view which displays the position where the car was throughout the day (24hr period) - this page takes a long time to load. We tried indexing the db, de-normalizing it and also re-wrting the queries - but still not a great improvement. Is there any other best practise that we should follow to load huge loads of data into a webpage (there should be no pagination)? Can we somehow bring it to the clientside using AJAX and try loading it when the button is clicked?
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Mar 1, 2010
what is the best way to bind a gridview with data from the database when the data is huge so that the application is fast?
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Dec 17, 2010
I am working with GridView, When huge amount of Data is inserted in the GridView its columns became very thin all tall, however I want to Display the Gridview with Fix size and if the Data is hugeit only display the starting few words of Data.in other words I want to use gridView same like the GMAIL account where Data Display like this. .
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Jun 16, 2010
I have a gridview with around 7000 rows in it.
The page takes huge amont of time to load..infact sometimes the browser just crashes..
Its a search form and the requirements are such that i cannot enable pagination in it.
How can i decrease the load time...
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May 27, 2010
I am trying to export huge record (having more than 3000000 of records) to exl file.
i have one class file which have function ExportToExcell .it is working fine for samll records ..but for big record,got fallowing error
Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.
Function is as falllow-first string for file name and othere three for any heading in exl file and datatable is data toexport.
I got all data in datatable but got error when try to export to exl
[Code]....
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Jan 6, 2012
I am Using OboutGrid to Display the data in my Webforms..this is cool when am binding small data..but when am binding huge data it takes more time to display the records rather than normal datagrid. How can i improve the performance..
<obout:Grid ID="GridView1" runat="server" AllowAddingRecords="false"
AutoGenerateColumns="false" CallbackMode="true"
FolderStyle="styles/style_13" Serialize="true" ShowColumnsFooter="true" ShowGroupFooter="true"
onrowdatabound="GridView1_RowDataBound" PageSize="-1"
PageSizeOptions="1,2,3,4,5,6,7,8,9,10,50,100,500,-1">
[Code] ....
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Oct 19, 2010
I have a 1.5 GB file into a table. I want to read It from server and create a file stream with it for save.
When I use DataAdapter.Fill(DataSet); code OutOfMemoryException occurs.
What should I do for read a hage file from data base?
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Feb 21, 2010
how can I create a query in order to select some records every time user wanna to display them into a gridview. I don't want to select all entire records from my data source. What I exactly want is to simulate pagination by query.
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Nov 3, 2010
I am trying to debug one of the project in which i need to show the data for one of the particular cell in two lines.
This Repeator control Exists in a user control and aspx is calling this User control for displaying the data.
Here is how my code looks:
[Code]....
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Jul 31, 2010
i have 2 dropdownlist and gridview. Im trying to make a link after displaying the relational data in the gridview like below But how can i get the value and combine with the link
[Code]....
this is the all of my code
[Code]....
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Oct 31, 2010
I have a datagrid which pulls data from a single database table to display it. However, this database table also contains information on the thumbnail URL for each record, and I would like to display the thumbnails for each record in the 1st column of the datagrid.
At present I have added the following to my datagrid:
[Code]....
So I presume the main challenge now is to set the Thumbnail.ImageUrl property to the correct file path in the VB.NET code. But how do I do this for each record? I am using a function to retrieve data for the gridview, which is based on the following:
[Code]....
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Feb 9, 2010
I have created a web service and successfully displayed the data in a TextBox within another Project.
However, I have modified my web service so the data returned will return multiple enteries for the data rather than a singular value.
I would like to display all output fields from my web service into a GridView.
Is it possible to do this without modifying my GridView to display a ListView output etc...
Basically, I just want to place each field into a Gridview.
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Nov 30, 2010
is there a possibility to do the following:
I have a GridView which has a button in each row. On click event I want to open a new window displaying the xml data of the row.
I tried to this with the following code in the RowCommand - event:
var doc = new XmlDocument();
doc.LoadXml(content);
Response.ContentType = "text/xml";
Response.ContentEncoding = System.Text.Encoding.UTF8;
doc.Save(context.Response.Output);
This always generates a script error:
Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed.
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Mar 24, 2010
I have a Table (in SQL Server) that is being updated roughly every minute or so with new records being inserted from various sources. The number of records inserted in this duration varies from a few records up to dozens of new records. I am using an update panel to rebind my data every minute to keep the GridView current. Now that I have the data refreshing I am looking for a better solution than reloading the data every minute. how to best keep my GridView up to date? Here is what I would like to accomplish:
1. Load the GridView and refresh the contents every minute. (60 second intervals)
2. When the GridView is refreshed every minute I would like to append only the new records to the existing grid, rather than bringing back the entire result set with each round trip to the database.
3. I would like a visual cue to identify the rows that have been inserted into the GridView. If new rows were to flash/flicker with a background color (yellow) that would be ideal.
Am I even using the correct control for displaying real time data, or are their other options? I essentially am looking to find the preferred method of displaying data that is being updated in real time in a web application. I'm hoping there is a solution involving AJAX but I haven't been able to find much on The Google. I am open to changing anything and everything about my approach -- this is largely a learning exercise. For testing purposes I am currently using LinqDataSource in conjunction with a GridView in an UpdatePanel being refreshed by a Timer control every 60 seconds. Informational: I have also started playing with the [URL] in place of the Timer control. However, for the purposes of this example I would be content to achieve the desired behavior using native controls as I have described them above.
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Feb 4, 2011
I am doing a search function where when user enters specific value (either by keying product name or product code) into textbox, data will be displayed using gridview.
However i have problems displaying it in gridview.
Below is my code:
[code]...
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Jan 10, 2011
here I can find some info on how to display data from my MSSQL database in something like old style tables (table,<tr>,<td>) becouse I used to done it like this in classic asp but i had a formula for calculating where to put tr or td and it becomed very confused, not to mention displaying gruped records like 10 on each page...I tried gridview in VisualStudio but I can not find any info how to use sql in it so I think it can not help me becouse it is to much predefined and I do not know where I can change code for it like what data source to use, sql and other important thing
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Jul 15, 2010
I am currently trying to figure out the best way to handle a data formatting issue. I have a stored procedure that pulls back basically all the data I need, but using a gridview doesn't really give me what I need.
For example...currently the gridview displays data like:
Date1 ProjectCode1 Hours ApproveChkBox
Date1 ProjectCode2 Hours ApproveChkBox
Date1 ProjectCode3 Hours ApproveChkBox
Date2 ProjectCode1 Hours ApproveChkBox
...
I would like to be able to display the information like:
[code]....
Is there anyway to do this using a nested gridview? Or is there a proper way to display this type of format?
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Aug 23, 2010
I have a problem displaying data in a Grid View control when set a row to visible = false when a certain condition is true.
For example, if a DataRowData value has a condition set to true (custom in table) I set the visible property to false, so the data row will not be visible at run time.
The problem is that I'm using paging (10 rows per page) and if 8 of those rows fall into the true condition that won't show the row, that grid view page will only show two rows of data in page 1. The worst scenario is that if I go to page 2 of the grid view and all the rows (10) fall into the true condition, that grid view page will not show any data at all.
How can I show 10 rows of data at all times in a gridview? In other words, I would like to just show the visible rows at all times.
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Nov 9, 2010
I have a Transport Detaisl in DB , i want to dispay data on gridview with marquee scrolling up. Cabs are scheduled for drop every hour. So if drop is at 7pm i hav to dispaly on data of that hour from 6:30 to 7:15 later after 7:15 i have to display next hour data ie 8:00 pm drop data. I am able to get scrollin g data on gridview but how to schedlue it to scroll for such timings
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Nov 27, 2010
In one of my application, I have around 2000 records which i am displaying in gridview with normal paging.
Now I want to change this paging facility and would like to show a "more" button at the footer(just like [URL] has). The moment user clicks it, the next set of data will be retreived. This will go on till all the records are fetched.
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Jun 21, 2010
I have a gridview with 20 records and I have scroll bar to scroll down to view the records.I m displaying respective row data when click on the select button in grid view. The problem is whenever I select the
row, the gridview refreshes and scroll bar is going up. Ofcourse it is displaying correct data. but the gridview refreshes and scroll bar goes up.I want the selected row to be shown when I select that row.
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Apr 20, 2010
I'm currently exporting a database table with huge data (100000+ records) into an xml file using XmlTextWriter class and I'm writing directly to a file on the physical drive.
_XmlTextWriterObject = new XmlTextWriter(_xmlFilePath, null);
While my code runs ok, my question is that is it the best approach? Or should I write the whole xml in memory stream first and then write the xml document in physical file from memory stream? And what are the effects on memory/ performance in both cases?
EDIT
I will indeed be using XmlTextWriter but I meant to say whether to pass a physical file path string to the XmlTextWriter constructor (or, as John suggested, to the XmlTextWriter.Create() method) or use stream based api. My current code looks like the following:
[Code]....
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Mar 29, 2010
I want to display values aligned with a header grid. An employee might start from 7:00 a.m. to 9:00 a.m. for their first break. I am trying to display the values 7:00 and 9:00 aligned with the header.
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Oct 20, 2010
I have a page with a datalist on it. The datalist shows numerous rows with various data in each column, each showin in a textbox. I'd like the user to be able to select or not select each row (displayed in datalist), and then to click a button which would place all of the data in selected rows into one big label so that it can be printed or emailed.
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Jul 21, 2010
I'm in the process of developing a survey system. The tables / fields that are related to my question are:
[Code]....
My issues with this way were:
1) The Data Adaptors receive ALL the records from their correspondent tables. Not a good practice, I believe.
2) If, at some point, the survey had no categories, questions or choices under its child records, an error occurs when the page tries to build the Data Relation. With the work flow I had in mind for the system, this is bound to happen becuase all the Data entry pages (Add Category, Add Question, Add Choice) will be displaying the newly-created survey in a similar fashion (at which point, the survey will have no child records and so an error would occur)
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