I have a gridview that I only want to show if the page is a postback. I'm not a very good programmer. show me some VB code that will assist this. I think I want to use a page load event and IF NOT Postback then visible = false for my gridview but I don't know how to write it out...
View 4 RepliesI have a grid view that is dynamically created.In which every cell in the girdview has a 2 textbox (cTxtboxQty,ctxtWorkOrder) and 2 label.
When user click on the cell, a pop up come out and user are able to change the text inside the cell and click save.After that the pop up close and changed data immediately reflected on the screen.
My problem is:
After my data are changed and updated to database on the pop up page and having it post back to the parent page , my dynamically created textbox in gridview retain old value even new value has been assigned to it.
This sound very weird but i have no idea how to solve this.
My client side code is as below :
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I have tested many times and find out that it might be the page hold the old value in memory, so that even we have updated the textbox value, after postback, it still keep and show the old value?
I have a web application that takes information entered by the user and displays it in a few datagrids, that are located withing a multiview.
In order to enter a row to a datagrid the user enters some information and clicking on a button calls a function that adds the data to an arraylist, which is the source of the datagrid. In addition, every postback the data is binded to the datagrid.
It all works fine in the first time, but from the second row and on it enters only parts of the data and ignores the rest.
In nested gridview, i am finding some problem, i want to show child Grid headers in Parent Gridview. Can anyone tell me that how it is possible? Its very urgent. Waiting for quick response.
View 1 RepliesI'm trying to extend the GridView control to enable sorting and paging for any situation.
When using my control I am fetching data from a database and filling a DataSet with it, then binding the GridView upon every page load. My first question would be, is this the correct approach?
To sort the GridView I am overriding the OnSorting method which stores the sort expression and direction in the ViewState, then creates a DataView and utalises the Sort method to sort the underlying data. It then sets the Data Source to this DataView and rebinds the GridView.
Paging is handled by OnPageIndexChanging which simply sets the PageIndex property and again rebinds the GridView.
My problem is; when any control causes a postback my GridView is no longer sorted, presumably because it is persistently rebound. If I don't rebind it then the GridView is empty on postback since the data isn't automatically stored in the ViewState. I have considered saving the data source in the ViewState but I would assume that this is bad practice for large amounts of data? - also DataViews are not seralisable.
The only solution I can think of currently is to override OnDataBound and sort the data every time. This results in a double sort when paging triggers a postback which seems inefficient. Code illustration of this below,
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I'm looking for the cleanest 'best practice' solution as this is a learning exercise more than anything else.
I have a customized gridvew i.e. grvResult. There is a textbox and a InsertButton in the footer.
If there is a data populated into gridview it is showing GridView footer and inserting data but if there is no data in gridview then its footer also not visible.
I have tried in two ways to make footer visible but it is showing following error:
Object reference not set to an instance of an object.
Tried ways:
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Currently I have something like this, but when I click "update" the record doesn't get updated (but no error is returned).
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i have a global field called hotelId. i then have this piece of code that gets a value from gridview row:
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the local variable is assigned to my global one, which gets passed to my method along with other variables. while stepping through i can see the value is set, but when i hit the submit button variabl is passed to another method except my hoteId. it gets lost...
I design a page which contains one dropdownlist, gridview1 and gridview2. All of them extract data from the same table (a SqlDataSource). The Gridview1 is used to edit, update data with edit, update and cancel button. My problems are:
1. After update gridview1, the dropdownlist and gridview2 don't update data.
2.After updata gridview1, the gridview1 resets to its original state if refresh page.
I have a gridview which is ShowSelectButton = "False"
I use
e.Row.Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(sender, "Select$" & e.Row.RowIndex.ToString))
to select a gridviewrow but it causes a postback whenever I select a row. Is there a way to allow selecting a gridview row which will not cause a postback??
I am trying to create a form that displays a dropdown and a password. The dropdown will act as the login for the password. If the password is correct the dropdown should be the variable for a gridview that should be visible? Can someone look at my code and see where I may be going wrong or any hints?
ASP Code
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c#
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I've got a GridView on my page which has some bound controls, one of which is a label (to display total price):
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However this value is not being passed to my page. All I see is '£' symbol, no price which makes me think Viewstate["youpay"] is empty? I have enabled viewstate on the Page and Control tags.
I have a gridview where in the users are allowed to edit certain data and there is an update on top of the page which will send out all the changes made inside the GridView. But, the problem is , as soon as the update button is clicked, the grid disappearsand no update is made. This problem occurs when the size of the data on the page is huge. When we have less amount of data on the gridview, It does update. But, when there is a huge amount of data on the gridview, it does not. We have tried to increase the page size on the server, but to no use.
View 3 RepliesI 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 have a c# code that put some background color in cells according with some values, the problem is that each time I add a button or a postback occurs I lost all colors (and other attribs).So my workaround in call the function that fills the gridview each time... but this produce a slow performance.
View 4 RepliesI have a grid view whose 1st column is Image Field. Now I assign 1 out of 4 images to each row at runtime. I have this gridview in ajax updatepanel. Now how can i persist the images in the first column after a postback.
View 6 RepliesIm binding the gridview in page load.After i click the link button in the gridview it displays another gridview.I have a checkbox in that gridview.I check some of the checkboxes.while i click the save button i want to get that checkbox state whether its checked or not.Bt for me its showing no records in the grid.How do i persist my data and get the checbox's state.
View 3 RepliesI have a GridView on a web form, which displays data fetch from database using Linq. When I update the GridView in a button event on server side everything works fine. Now I want to update the GridView from a JavaScript funciton call. Here is the code on the page.
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And here is the code behide
protected void Buttons_Click(object sender, EventArgs e)
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The problem is that GridView1 never gets updated in IE. It works perfectly in Firefox. I can see the event was triggered by the Javascirpt call and I get correct dataset from database through debug. However the GridView never display the correct data. Is GridView handled different from regular web form control?
I have a Gridview inside and UpdatePanel, Rows in this Gridview contains a DropDownsLists, each row has this attribute:
€œe.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.GridViewPJ, "Select$" + e.Row.RowIndex);", to select rows on mouse click.
If i click on the dropDownlist Contained by the row, this algo launch a postback, so I can never see this DropDownList deployed.I need a Way to stop this postback. Is teher a solution for this?
I ahve displayed a group of data in my gridvew with the edit option linkbutton template field for each row. The gridview columns consist of employee name and projectname and total hours field employee worked.
So in this when i click the edit button using the datakeynames alue for project name id and employee id ,i have to redirect the page to another page with the values in the grid for the particular employee.so that i can update the totalhours field in the redirected page.and if i press the update button in that page then the page should be redirected to the gridview page with the updated value for the particular employee and project. The page which should be redirected consist of project name dropdownlist, module field,date field and total hours field. No employee name field.
Using the gridview rowdatabound field i have postbacked the url page with the project name id but it does not displays the project in the redirected page.And employee name i have to redirect with the session value i think?
I have a GridView inside an UpdatePanel in which there is a TemplateField column. I need to save the value of this column every time a user changes it. The problem is that when the TextChanged event causes a postback, the GridView datasource is set to nothing. I've noticed that this happens every time there's a postback. Why?
Here is the code:
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<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Prova.aspx.vb" Inherits="Prova" %>
In asp I want to add row to my gridview when I read barcode. But when I want to add second row , gridview.datasource = null. So, my first row is removed from gridview in TxtBxBarcode_TextChanged event.
TxtBxBarcode and gridview are in the different update panels.
How can I prevent this "gridview.datasource is null when Postback" ?
I am having an issue with the gridview in ASP.NET. Everything works well when running from IDE in both debug and without debug. When I publish to IIS I have a gridview that I use in two places. It works fine in one place but not the other. In one instance I am using an IFRAME tag to display the page that uses this data grid. When I first load it it works fine, I can click on a row. But after clicking on that row after the first postback, I can no longer get it to postback again on future clicks. I used firefly and after clicking the first time on the grid, the tags for the table are not rendered though I can clearly see the grid. Confused... Here is the rendered code before clicking on it using firefly. (oh yea, this gridview is also inside of an updatePanel) (In the below I replaced actual data with xxxx)
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Below is the code after clicking on the grid.
<div id="UpdatePanel1">
<div style="background-color: white; width: 818px; height: 405px; overflow: auto" onscroll="GetScroll()" id="divFill">
<div style="padding-bottom: 5px; background-color: buttonface; width: 818px; height: 20px; padding-top: 5px" id="NavFoot" align="right">
</div>
Also, if I did not provide enough information let me know.
I've got a Gridview in which I use the RowDataBound handler to color the lines according to certain conditions
(ie if column x is value y then change the background-color of the row to z etc).
One problem though, as soon as I do a postback the coloring disappears altogether and all rows become white.
Is there some way around this so I can retain my background colors even after a postback?
I have problems with gridview that has command button in it. The command button (when clicked) should redirect to another web page, but instead of doing it only does postback on current page.
.aspx file
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.cs file
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