Forms Data Controls :: Trigger QueryExtender From Code Behind (without Button)?
Jan 17, 2011Is it possible to substitute submit button which triggers QueryExtender filtering by a code?
how would you do it?
Is it possible to substitute submit button which triggers QueryExtender filtering by a code?
how would you do it?
I am trying to dynamically add a queryextender expression to the page. something like, when the user clicks a button, we need to add a OrderbyExpression. The following is the code used. It works when added in Page_Load but doesn't when added on a button click event. Upon button click the page just reloads and ignores the filter condition.
OrderByExpression obex = new OrderByExpression();
obex.DataField = "ProductName";
obex.Direction = SortDirection.Descending;
ThenBy tb = new ThenBy();
tb.DataField = "UnitsInStock";
tb.Direction = SortDirection.Ascending;
obex.ThenByExpressions.Add(tb);
this.q.Expressions.Add(obex);
where queryextender1 is the ID of the queryextender
I have 3 gridviews in one of my web page, each of which will display different data based on the typeid. I have simplified the system structure in the image below(further description will be stated below the image):
As shown in the image above, the web site(presentation layer) will work closely with the Business Logic layer(BLL) and Data Access Layer(DLL). ObjectDataSource control will be the middle man to select, update, insert and delete the data in the gridviews.
During Select, returned data from the database at DAL will be stored in a datatable and return to BLL and then the website itself.
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However, the Update(command button) and Delete(template field) doesn't work,the RowUpdating and RowDeleting event wasn't trigger when I click on the button, but it works if I set the gridviews' datasourceid to the objectdatasource.
Anyway i'm using RegularExpressionValidator and CompareValidator to check on textbox errors.
Now when i press a button it will go to my code and i will then try to detect for RegularExpressionValidator or CompareValidator errors by doing:
If not RegularExpressionValidator.IsValid
Now the question is if there is a way to bind the button with the validators so it will not trigger the code if the expressions are wrong.
I would have goggled it but i don't know exactly what to write on the search box.So i get un-useful results.
I have a web page that I am trying to use modal popup extender with aLink button as trigger (Code Below). When I execute the code and click on the link button (TargetId) the parameter for graying out the page below the popup works but I do not see the ModalPopup panel
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I have required validation controls on a page. If the user got to this page by mistake and wants to go to a different section of the website using the navigational buttons; required validators are triggered and it will not let the user navigate away. Ho do I get validators to trigger only when a submit button is clicked?
View 3 RepliesI have been alerted to the Query Extender control through previous posts, but I am still seeking the final part of my desired solution.
NB the following is written in conceptual English (programming specification) format, rather than actual asp code.
While I fully understand that I can use the QueryExtender control to pass a parameter from one web page to another, I do not see, and maybe this is not even possible, how I can pass a parameter of which field I want to select on.
Ideally I would like to be able to implement a query which is
SELECT tiles where 'Passed Variable Name' contains 'Passed Test Value'
such as would then generate, for example -
[code]....
I have only mentioned three in the concept above but there are actually about half a dozen different calling pages, and there could develop a few more over time.
I am trying to write some code where it sets the imageUrl of an ASP Image from the codebehind (on a timer), but it does not change it on my screen (its changing in debug view). I assume this is because I need to postback everytime I change the image. Problem is, I cant trigger the postback from CodeBehind so that it will change. How do I do that?
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I am so used to win32 forms -- Just started again with ASP websites.
How do you made a reference to an imagebutton in the code behind? I'm trying to show a high priority "!" image if an "h" was in the label. the code below.
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How to do trigger a javascript code after client validation?
View 6 RepliesI have webpage containing 3 views of multiview control. In the first view there are 3 fields Name Age Surname
which will be captured in the textbox for the respective fields.In the second view i have three more fields
sex
maritalstatus
bloodgroup
which will be entered in the respective textboxes and a submit button to store the data in both the views in the sql server database. I have all the fields in the sql server table which are mentioned in the webpage.I need the complete code for storing the entered data in both the views of the multiview control after hitting the submit button.
I have a very complex page with 11 formviews, 1 dropdownlist, and 11 sqlDataSources.I have several issues
Page: This page controls my website users and their info. There are 2 different users with 3 different permissions; users - 1 Primary(account Creator), and the rest; Permissions - View, Edit(Manage), Create/Delete(Author)
Each Formview controls one column in the table.
1st. After Permissions are read, the add, delete buttons are to be disabled if no permission. If the User selected is the PrimaryUser the delete button is disabled. On Page load, the delete button is enabled even though the displayed user is the Primary, when you select another user, then select the primary again, the delete button is disabled, but when you select another user the delete button is still disabled. This should not be!
2nd. I then added a check to see if there was one or more locations, and if there is only one, then disable the edit button that allows a user to assign a user to a specific location. example: if there are 3 locations, you may assign a user to that office location, but if there is only one location, there is no need. I try to disable the edit button in formview, but I get "object reference not set to instance" which is total cr#$ because the button is there in the form.
3rd. When a page loads and all of your sqlDataSources have a Select controlParameter that is determined by a DropDownList, how is the initial record determined other than it is the first record?No matter how I work my code, these issues do not work, and it is very frustrating and holding my project back. I have been working on thes for a week.
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I am retriving radio button from gridview and setting checked=true.But it is not working in code behind.How can we do that?
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I feel like a neewbie for this question but I can not make my linkbutton to trigger when created from code behind.What am I missing here?
this is what I got.
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Trying to add some custom code behind the cancel button built into a details view. How would I go about doing this?This is what i have currently. But, when clicked, the cancel button does not pick this up.
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I get an error when attempting to navigate to the page containing this gridview. The error is
'SelectPackage_Click' is not a member of 'ASP.offer_aspx'.
here my page directive:
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Here is my markup. Eventhough SelectPackage_Click is present in the code behind, it is not wired up with the button control.
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I want to make a button in footer template invisible from code behind, but i am unable to do that.
I tried
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I have a grid view with the delete option enabled. When the user clicks on delete, that entry in the database is deleted. However, each entry in my database corresponds to 2 images on the server. When that entry in the database is deleted, I also want to delete the images. (the images consist of the ID for that database entry plus "right.jpg", and "left.jpg") Is there a simple way to do this? My thoughts are that I need to run some additional code when the user clicks the delete button, but how can I trigger this code?
View 2 Repliescode for inserting rows by button click on table or grid
View 5 RepliesIs there anyway to trigger the ValidationSummary before the user hits a button that causes validation?I have a bunch of text boxes with Required and Rregex validators attached, as I type in them and tab out they trigger their errors however the summary doesn't show anything until I hit the Submit button. Any way to have the ValidationSummary update itself in the same way as all other validators?
View 5 RepliesTrigger multiple buttons when upload button is clicked in ASP.Net.
View 1 RepliesI have 3 gridviews in one of my web page. I have simplified the system structure in the image below(further description will be stated below the image): As shown in the image above, the web site(presentation layer) will work closely with the Business Logic layer(BLL) and Data Access Layer(DLL). ObjectDataSource control will be the middle man to select, update, insert and delete the data in the gridviews. During Select, returned data from the database at DAL will be stored in a datatable and return to BLL and then the website itself.
The data in the returned datatable will be filetered by type using RowFilter method and stored into the 3 dataviews. Each dataview will act as the datasource for the 3 GridViews respectively, and therefore I specified the datasource programatically instead of setting the datasourceid for each gridview.
dataview1 = New DataView(dtSelectedTable)
dataview1.RowFilter = "Type='1'"
GridView1.DataSource = dataview1
GridView1.DataBind()
dataview2 = New DataView(dtSelectedTable)
dataview2.RowFilter = "Type='2'"
GridView2.DataSource = dataview2
GridView2.DataBind()
dataview3 = New DataView(dtSelectedTable)
dataview3.RowFilter = "Type='3'"
GridView2.DataSource = dataview3
GridView2.DataBind()
However, the Update(command button) and Delete(template field) doesn't work, the RowUpdating and RowDeleting event wasn't trigger when I click on the button, but it works if I set the gridviews' datasourceid to the objectdatasource. I couldn't figure out why, hope that someone who have come across the same problem couldn't provide some guidance.
I am have a page with a couple of dropdowns which serve as criteria for a select SPROC. Once a selection is made in a drop down a panel is shown which contains gridview whose rows have been returned by the select SPROC.If you close the panel and change the drop down selection and then redsplay your panel the data from your prior selection is still displayed in the gridview,
unless you page to the next group of records.
I am working on a datagrid that has a column with checkboxes... the checkboxes should be checked when the page loaded. The problem is that whenever I trigger a postback, all the checkboxes will be unchecked!!
I don't know what is causing this or what should I do to prevent it from unchecking the checkboxes.
I have one button and gridview.
The button is located at the outside of gridview.
By clicking the button, I want to trigger the RowCommand event in that grid.
Obviously, I know that I can create same function to run it in that button to achieve samething in the RowCommand event.
However, I would like to know that techinically, I can simply trigger the RowCommand event from outside of GridView.