Forms Data Controls :: Dataset Keeps Resetting Back To Empty?
May 11, 2010
I have on top of the page..
Dim dsDataset as new dataset
In the page load..
If ispostback = false then
dsDataSet = .....
END IF
Now I have a button where when clicked..
dsDataSet = anotherdataset...
Now I have 1 button that all what it does is loop through the dataset..
For each row in dsDataSet.tables(0).rows
Now the problem is that when I click on the last button, it says (cannot find table 0) which means the dataset is empty, why does the info in the dataset get removed on the postbacks? how can I avoid this?
I have an aspx page for Search Options. There are three aspx Dropdown List Controls that are each bound to seperate data sources. The selection made in the Dropdown control is used in a SQL Query within a GridView data source to display the results list.
When I select an item from the drop down list I get the search result, but I want the drop down list to return to it's initial state after it displays the result, so the next selection made will clear the results list from the first selection. I have tried a number of different approaches, but no success. Seems like this should be easy, but I'm new to coding.
I have found a couple of possibles on the forum, but they didn't work. Not sure if you can make any sense of this, but I'll try to give you something more to go on. All I really want to do is reset the dropdown after it displays the results of the search, which I assume is after a PostBack. Here is what I have tried in the Code Behind or Script.
This for just one of the Dropdown Lists, ID=Practices. I have been trying to make this work for way too long. Also, I have tried it with AutoPostBack set to true but same problem. Currently have a 'Submit" button on the page to initiate the search.
If the gridview binds to empty dataset, I need to still show a gridview so that users can ADD more using the textfields in the bottom of the footer template. Since the gridview is empty it won't bind not allowing rendering of the <footer template> I guess I should create a empty dataset if the gridview is empty. How do I check for this and can this be done in GridviewRowEventArgs
I have a gridview with two bound fields. On clicking a button i want to display the values in first row of gridview in two textboxes. But if gridview cell is empty i am getting the text in textbox to which the value of cell is given as -' 'i know my problem will be solved if i use the template fields instead. But i want a solution while maintaining the bound fields ,if any.
I have a paramater Country Which have options to select 10 different countries.. i am using 10 tablix one for each country .... When i select a country , only one tablix Gets visible and the other 9 tablix gets invisible.. The problem is that all the invisible tablix are calling sp that is dataset ... Cause it is reducing the performance of the report......how can i assign empty dataset to the tablix or conditionally change the dataset for the tablix based on a parameter...
Codebehind: creating dataset, getting data from sql with adaptor and filling into dataset object, then setting detailsview's datasource. I add 2 button to above template to able to edit data at asp page, and added event handlers:buttons:
[Code]....
My question is, what to do inside the detailsview update event function to able to edit and update data. My method can be wrong too.
I am trying to populate a gridview using two tables. I also have a strongly typed dataset and used the method on this page: [URL] the problem is that, when i try to use two table the gridview does show up (I checked through debugging that the datatable comes back as empty).
MyLinqDBDatacontext db = new MyLinqDBDatacontext(); var taskname= db.my_stored_proc_get_taskName(int taskId); gridview.datasource= taskname; gridview.databind(); this works fine
but i when i am using LINQ it gives me result in the form ISingleResult so can anyone tell me how to get a dataset from a girdview after assigning data to gridview
I need a functionality something like :
Dataset ds= new Dataset(); ds="Here i want a dataset converted from a gridview"
I want to reformat one column in database. So that I've used strong typed dataset by drag and drop in VS 2008. When I've already updated all data in dataset, I call method update() of table adapter to perform update my modified data of dataset into database. But it doesn't work.
Below is my code
[Code]....
The RemoveWhiteSpace(string input) is my function to remove special characters from dataset.
When I click on the Alphabets it will show the details of a player...however, when that particular letters has no details of the player..I want to show."No results can be found"..Is there anyway to do it?
I have a gridview bound to a sqldatasource with editing enabled. If I click Edit, then either Cancel or Update, the update or cancel occurs and the Edit button reappears. However, I cannot then click the browser's back button without having the Update and Cancel buttons reappear. A second click of the back button takes me to a state where the Edit button shows again, *then* another back button click will take me to the referring page (the one before the one with the gridview on it.) IOW, it looks like the postbacks are cached. How can I prevent this and have the back button go straight to the referring page?
I have 3 drop boxes: 1.) Choose Operation 2.) Choose Site 3.) Choose Area. All three of them are linked to an SQL server database which has 3 tables following the same heiarchy of order. I.e. Areas belong to a Site and Sites belong to an operation. And there can only be one operation per site, or one site per area.
First you select an operation, then the page auto postbacks to filter the sites. Then you pick a site and again it autopostbacks to filter the areas. The issue I am having is that when an associated operation has no sites underneight it, and therefore no areas under that, the previous values that were in the boxes are displayed and the user can't click on the boxes anymore. I think this is kind of cheap looking and would like a way to make it so the boxes are clear (i.e. nothin in them). Is there anyway to check if they are going to freeze like that and assign them blank values?
i want to merge all the dataset table in one dataset is working fine . if it is empty dataset means it rejects that datatable but i want to show the col name with empty values for that i want this below format
I've been working on this bug for a while, but I'm at a loss. I have a table I'm building up based on the item selected in a DropDownList. The table gets built, and consists of a bunch of text fields, drop downs and check boxes. The fields work in that you can input whatever values you want, however if you change an item with AutoPostBack enabled, the entire table resets to its default values.
This is slightly peculiar -- and undesired -- but what makes it so strange to me is that after this if you then type in data again and use anything that AutoPostBacks, the table maintains its values (and continues to do so if you AutoPostBack any number of times). I would really appreciate it if anyone could give me some insight on why this might be happening.
Probably a simple fix to this I am not sure. Basically, I have a MasterPage that contains a Dropdownlist. This DDL controls what is displayed in ContentPlaceHolder. However, when postbacks are caused within the Contact Pages the DDL is resetting itself. How can I keep the selected value for the DDL between postbacks?
private void FillDetails(string pId, out string Name, out string Address)
[code]....
I have method called Filldetails(),This method uses stored procedure to retrieve information for product name and address based on productid passed from productdetails table.I am working on globalization project.We have this product information for US country but there is no product information for germany country.So dataset is empty for germany.As result I am getting error object reference not set to an instance of the object.
I have a dataset stored as a CLOB field in an Oracle table. I want to be able to pull this field out and type it back to a dataset. Is this possible and if so how?
I am using Asp.net and requirement specifies i use html input to post files to server rather than asp:fileupload.[ Reason : Add more html input file controls similar to CPanel file manager.(i.e) clicking on link adds another file input from which user can select another file*.But when ever i post back Request Files collection is always empty.* HTML FORM:
<form method="post" enctype="multipart/form-data" action="documents.aspx"> <div> <input type="file" name="attachment" id="attachment" onchange="validate(this)" /> <span class="none">Filename should be within (1-25) letters long. Can Contain only letters & numbers</span> <div id="moreUploads"> </div> <div id="moreUploadsLink" style="display: none;"> <a href="javascript:addFileInput();">Attach another File</a></div> <input type="submit" id="btnSubmit" /> </div> </form>
Javascript:
var upload_number = 2;function addFileInput() { try { var fileUpload = document.getElementById("attachment"); var elemSpan = nextElement(fileUpload).cloneNode(true); var elemDiv = document.getElementById("moreUploads"); var d = document.createElement("div"); var file = document.createElement("input"); file.setAttribute("type", "file"); file.setAttribute("id", "attachment" + upload_number); file.setAttribute("onchange", "validate(this)"); d.appendChild(file); d.appendChild(elemSpan); elemDiv.appendChild(d); upload_number++; } catch (err) { alert(err);}}
the validate(this) is a function that validates file types on client.When validation succeeds then the link to add more file inputs is enabled. Could someone throw somelight on this.
How to display empty GridView to insert new record if no data retreived for some record on the result from data table?Actually i am trying to give a user an option to add recrod from Gridview. On result of some query it is perfectly displaying data and a footer row with the insertion textbox but when there is no data in the gridview it is not displaying. It should display with footer having insert textbox.
I have a listview control bound to an SqlDataSource. As part of the formatting I want to add a title to the data returned from my database. For instance if the data base returns a phone number I want to add 'Tel.' first. However I do not want to diplay this title if the datafield is empty. Here is what I have done so far.
Business is a phone number. If the data field contains a number I get: Tel. 1234 123456. If the field is empty I get Tel. If Business is null I want nothing dsplayed, how do I do this?
I would like to find controls in the detailsview control placed in the EmptyData Template of the gridview. I am trying to create Insert new record for the gridview control.
1. If there are existing records in the table - works fine and sets my two values: I placed Detailsview and Insert Button in the footer of the gridview. I needed to set the values of two fields. When I click on the Insert button it saves new record and sets the field with the value (code attached - works fine). I also have a popup extender that opens detailsview - this works just fine.
2, If ther are not records in the table - saves record but cannot find and set controls on the detailsview Same thing setup in the EmptyData Template. The record is saved but I cannot Find and set the field value on the control.
1. Link button (on click) in the gridview footer (works fine)
i have retrieved data from the database and stored in dataset.i have to add an additonal row to it,update the data in data set and delete data from the data set..
I have a 3 text boxes. When i enter datas in and click the button it displays the gridview with filtered data. Now my problem is if there is no data in gridview it has to show "no data" so I used emptydatatext property.. The problem is, in the page load itself it shows "no data"
