in other words, reading the content (records that lies within) of a LinqDataSource object programatically (i.e. similar to what the GridView class does internally when binding to a LinqDataSource object).
View 4 RepliesHow I can bind texbox to one property from linqdatasource?
I mean something like databinding contols in c# app
I have a Webcontrol, that I create completely dynamically and it contains radiobuttonList. How can I acces this radibuttonlist values, on pages where I register this control?
public class MyControl: WebControl
pnContainer = new Panel();
rbl = new RadioButtonList();
liResume = new ListItem("Resume", "Resume");
liReopen = new ListItem("ReOpen", "ReOpen");
rbl.Items.Add(liResume);
rbl.Items.Add(liReopen);
pnContainer.Controls.Add(lblReOpenTitle);
pnContainer.Controls.Add(rbl);
this.Controls.Add(pnContainer);
A Template contains <input type='CheckBox'>(not server control) in my GridView.
The idea that get the which line I checked and get the data of the line at other columns.
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My question is: how can i create my own parameter based upon the QueryStringParameter?
Example:
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I now called it QueryStringGuidParameter.
The purpose of this is: I'm not sending any querystring's via the aspx?querystring other thasn aspx?guid={guid identifier}.I hope my code below explains it al little bit.
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A soon as a page Redirects f.i. with this example
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Instead of calling Response.Redirect i call the Redirect i created. This transforms the querystring in a session with a guid and parameter. The Redirect only sends the guid in the querystring. and the receiving page picks up the guid and translates it back into a querystring.
Purpose is you have a secure way of dealing with info sending via querystrings. Lets say in the past you could easily get other info from the page by just changing a value in the key send via a querystring. In my case lets say the user request a Customer "A" with querystring ?ID=1.
Simple change the query in the addressbar to ?ID=2 (or something else) would give him another customer. Maybe a customer he is not allowed to see. (Of course this can be prevented also in the business layer, but that's not the point.)
So if i simply could create a new QueryStringParameter lets say called QueryStringGuidParameter which i can use in the ObjectDataSource but ideally just for all controllers which are able to use the QueryStringParameter , i don't have to go into code behind and set the SelectParameters in there.
I have written the below pages (base of question) to populate my asp.net listview control from an objectdatasource. To allow for easier CRUD commands and to make my application more efficient I want to replace this objectdatasource with a linqdatasource but when I attempt this I receive a binding error which stops my ItemDataBound event firing? I'm basically replacing my objectdatasource with the below linqdatasource...
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Am I placing my query within the wrong event? Why does my ItemDataBound event not fire?
PAGES:
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In my web app, I used LinqDataSource, ListView and DataPager (.NET 3.5 sp1) to implement search feature with paging. I have a button to trigger the search.
But In the first time, the Selecting event of LinqDataSource fire twice and I don't know why (I debugged my code very carefully). I don't use QueryString with DataPager and assign PageSize of DataPager in the first time of page load to prevent the ListView bind again (as in some instructions I found in forum)
I can't post my code because it's quite large.
i have a grdidview control on the .aspx page and i am trying to connect dynamically from code behind and bind the gridview but somehow it throwing me an error... what is wrong with this code?
LinqDataSource LDS_POReport = new LinqDataSource();
LDS_POReport.ContextTypeName = "DataContextDataContext";
LDS_POReport.Selecting += new EventHandler<LinqDataSourceSelectEventArgs>(LinqDataSourcePO_Selecting);
this.gvReport.DataSource = "LDS_POReport";
//this.gvReport.DataBind();
Update:
after i update the code to this.gvReport.DataSource = LDS_POReport;
it works fine but when i try to sort i get this error:
The GridView 'gvReport' fired event Sorting which wasn't handled.
i added this but no effect.
LDS_POReport.AutoPage = true;
LDS_POReport.AutoSort = true;
the problem is not solved the way i wanted but i go ahead give the credit to : ŁukaszW.pl for his time and effort.
i am using gridview control and a linqdatasource and its all working fine and i have added the functionlity of searchingBySubject and i added WhereParameters and than binding my gridview (see the code below) but somehow its not returning any rows and i see i have number of rows based on what i am searching.
protected void btnSearch_Click(object sender, EventArgs e)
{
this.LinqDataSource1.WhereParameters["Subject"].DefaultValue = this.txtSubject.Text;
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I have two tables:
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As you can see I have also added this column:
asp:BoundField DataField = 'Bind("Users.FirstName")'
I have the datapager working great. I have linkbuttons with certain commandnames and in the listview _itemcommand implement what to do when the linkbuttons are clicked. I have it now where I requery the lindatasource(LinqDataSource1.Where = "Category = ""Metals""") it works fine. When the linkbutton is clicked the datapager acts correct showing the right results, but when I click on the next page it resets to the linqdatasource1 results w/ out the where clause I implemented in the command. How do you maintain the datapager after you requery the linqdatasource in the codebehind.
<asp:DataPager ID="DataPager1" runat="server" PagedControlID="ListView1" PageSize="5" EnableViewState="True">
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I'm using a GridView and a LinQDataSource (Northwind database) and this error appears when website runs.
Here is my codes on aspx file and no codes in cs file.
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Im making a Master details web page ASP.NET. I have one aspx page with all the items in a listview, then a link to another page to show the details view, but I dont want to use a asp:detailsview control becasue it generates a table, and I want a more complex layout. I want work each property of the item, but I dont know how. I want to do in LINQ. This is my very bad aprox: I need an orientation of how to get ONLY one item from the LinqDataSource on the page load and not to query the database everytime I need a column. I dont need biding because I only need to show data, not insert, not update, not delete...
View 2 RepliesI have a databound gridview with 3 columns. I enumerate through each row to get values and put into an array. I would like to make column1 NOT visible to the user. but when I set Visible="False", it no longer can retieve that columns value as it enumerates.
Is there a way I can make the first column invisible to the user but still retrieve the values of that column when enumerating?
.I have a search page where I would search for an item and it would dispaly the results in a gridview...
I have allowed paging and set page size to 10..now I can see the 10 results in the first page and also see the page numbers at the bottom of gridview. But now when i click on the page 2, the method gridview_pageindexchanging is triggered but the result set is not dispalyed. My code is as below..
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i understand that the data is not binding in the GridView1_PageIndexChanging method..I do not know how can I make data bind..
I'm trying to build a chart in my application which will act as a client for an ASP.NET 3.5 web service that I created. The error I get is as follows:
Series data points do not support values of type System.Data.DataViewManagerListItemTypeDescriptor only values of these types can be used: Double, Decimal, Single, int, long, uint, ulong, String, DateTime, short, ushort.
I've tried various ways to resolve this but can't. This error points at the
chtStats.DataBind() line in the code below:
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If I have a Linqdatasource that isn't connected to a a bound control on my page how do I use the data source to read data in the code behind. ie
var query = (from x in linqdatasource select x)
What I actually want to do is create a data array (myArray) within the code, read all of the data from the linqdatasource (selecting 1 field to form tableDataArray), then compare the two arrays and then write (insert) those into in myArray that are not already in the datasource to the datasource (ie execute an insert back on the datasource).
regarding getting data from XML file and binding gridview with data .
View 6 RepliesI have a GridView or DetailsView and its bound to a CslaDataSource.I noticed that the "Object_Select()" event is fired automatically with every time the page is loaded or refreshed.How I can perfrom mnaual biding between the DetailsView Control and CslaDataSource ?I want to control binding via code using the DetailsView.DataBind() method in certain cases only.
View 4 RepliesHow can i retrieve the data in linqdatasource in code behind?i have a dynamic database design with column storing the datatype eg. text, int, date.i need to retrieve the value in order to populate the control and bind it.
View 5 RepliesGridview data binding which already has some data?
DataTable dt = new DataTable();
I have a ListView with a LinqDataSource that's not displaying data. Here is my source code:
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why the data won't display? As far as I can see, I've done everything right.
not quit sure where I've go wrong with this but hopefully someone might have an idea why this isn't working:
This what I thought would work:
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But it's not! what I get for the OnClientClick attribute is: "DeleteRowKey=<%# dataBinder.Eval(Container.dataItem, "idx_mstrWord") %> "
I've tried several variations (EVAL, BIND, specifying the container and not specifying the container),
none of which gives the expected results; OnClientClick="DeleteKeyRow=12345"
If I add a label and set the text to: <%# dataBinder.Eval(Container.dataItem, "idx_mstrWord") %> I get a number which is what I should but if I try to get it to embed it so my cleint script can work with the data all I get is binding command.
What am I doing wrong? I really don't want to have to kludge around with some hidden field and then have to search through the grid to get at this data key. I need this key on the client side in order to provide additional details in my confirmation popup modal.
I have a repeater control populated with data binding expressions like in the expression below...
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I want to be able to redirect a user to default link if the LinkURL value is empty, that is for each data item, there will be a check if the LinkURL field contains a value. If not, a default value will be supplied.
when i am selecting an item in dropdown list datasource is bind and after another selection it is bind again .but i want it bind only once.
View 4 Replies