Forms Data Controls :: Set Focus After Gridview Dropdownlist SelectedIndexChange Autopostback?
Feb 16, 2010
I have a Gridview that provides the user the student name for a particular class, a dropdown list to enter grades. If a grade of 'U' is given, a textbox appears in which the last day of attendance must be listed.
It works... though not as conviently as it could; the faculty would like to be able to tab from one dropdownlist to next in succession.
On each ddlGrades changes I write the value to the database and if a 'U' was chosen, display the textBox... but I can't figure how to set focus on the next ddlGrades control, or even the same ddlGrades control that initiated the postbock.
Below is my simplified .aspx followed by the codebehind
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Aug 11, 2010
I've tried many different ways to try to get the selectedIndexChange to work for my dropdownlist. It doesn't seem to work, when I debug, I can see that the page is doing a PostBack but the method that suppose to be taking care of the select index change doesn't seems to be fired. I notice that there is no "handles" in many post so I was just wondering why it doesn't have it?On postBack I didn't rebuild the list so the selectedIndexChange value shouldn't reset to 0.Sub ddlAccess_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) ''handles ......?"
...
end Sub
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Feb 8, 2010
I have the following code for my radiobutton selectedindexchange, i have a hidden field in the gridview with the cid( which is the unique id for the records, the last column in the gridview is the radiobutton and i want to update my record with the value of that radiobutton.
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Jan 14, 2010
I am problem with gridview pager template,i have a dropdownlist in my pagercontrol butdl.selectedindexchange is not getting fired up if i am trying to bind gridview at code behind.But if iam using sqldatasource instead its working fine.
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Feb 18, 2011
I have a DropDownList in a GridView with AutoPostBack="true" and on SelectedIndexChanged fires an event.
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Everything works fine across browsers as long as the user is scrolling through the DropDownList using a mouse.In IE8, things start to go haywire when the user is navigating the DropDownList using up/down arrows on the keyboard. The SelectedIndexChange event is fired with nearly every up/down key pressed. In Firefox 3 and Chrome 9, the behavior is more like what I would expect, that the event isn't fired until the user stops on DropDownList selection and hits the enter key.
Is there something that I should be doing in IE, short of setting AutoPostBack="false", so that the event is fired every time the up/down arrows are used on the keyboard?
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Feb 4, 2010
I have 5 textboxes in aspx page, and their AutoPostBack property is True. When I write something to first textbox and press tab key to write something to second textbox, the second textbox don't be focused. I have to select second textbox with mouse to write something it. I want to focus the second textbox by pressing tab key after write something to first textbox. HOW Can I do this?
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Feb 23, 2011
I have a webform that the user inputs a date via a javascript popup calander, then it auto populates a textbox with 45 days after the inputed date.
My question is is there a way to have a postback once the input date loses focus. Here is my page.
ASPX
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C#
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Oct 29, 2010
I have a form with several textboxes. All of these have AutoPostBack="True".
My problem is that the focus disappears to goodness knows where after each postback. The behaviour I would like to enforce is as follows,
If the user hits the Enter or Tab key after filling in a textbox then the focus should go to the next field on the form (to be explicitly specified in my code).
If the user clicks on textbox X after filling in textbox A then the focus should go to textbox X after postback, even if it is not the next in the list.
In other words, I want the form to behave in the way that most users would intuitively expect.
I have Googled for potential solutions to the loss of focus after postback but the few that I have found were many years old and I am unsure that the advice is still relevant for ASP.NET 4.0. Some of these old solutions also appeared to be invalid for browsers other than IE. What is the current best practice for handling this issue?
BTW, VB.NET solutions are preferred though I will also be happy to accept C# suggestions (which I would run through a code converter). Note that I have a single sub in my code for handling the TextChanged events for all my textboxes. This means that I have to use the following code to work with the textbox that has called the sub.
Dim CurrentTextBox
As
TextBox =
DirectCast(sender,
TextBox)
If addressing the focus problem means that I have to have individual TextChanged event subs for each textbox then so be it, but I prefer the simplicity of my current single sub approach.
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May 6, 2010
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User double clicks on a grid and a new Window Opens...User enters information and then I am going back and updating parts of the record.Once the code comes back from client-side onDblClick I am expecting the SelectedIndexChanged method to fire (so I can do additional server side processing) but it doesn't. Is there something I am missing?Right now my onDblClick event looks as followed:
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Dec 29, 2010
I have a page that when auto or partial post back happens, focus is set to the address bar rather than the next control. The interesting thing is that when I put an alert in my RadScriptBlock, after the OK is clicked, focus goes to the correct control -or- if I put in an invalid location, focus is returned to the ExpLocation control & when a correct location is input the second time, the tab order/focus command works correctly (see code below).
That has this up top
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Mar 9, 2010
In a gridview i am having two dropdownlist.in page load first dropdown will be populated and when an item is selected with in that based on dat selection i need to bind second drop down list.My problem is that selectedindexchaged event is not firing for first dropdown.The codings i used is below
aspx
************
<asp:GridView ID="gridview1" runat="server" AutoGenerateColumns="false"
onrowcommand="gridview1_RowCommand"
>
[code]...
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May 17, 2010
In my gridview, I have a column for Amount. I want to calculate the amount as soon as user changes the Amount and display calculated Amount in a textfield. What I have done is I have Amount as Templatefield and have set Autopostback = true. In the event handler for textChanged I have function for calculate Amount which will calculate the amount and set the calculated value in a textbox. But I am getting an error message:
[NullReferenceException: Object reference not set to an instance of an object.]
UpdateInvoice.calculateamt() +87
UpdateInvoice.txtAmt_TextChanged(Object sender, EventArgs e) +5
System.Web.UI.WebControls.TextBox.OnTextChanged(EventArgs e) +8739438
System.Web.UI.WebControls.TextBox.RaisePostDataChangedEvent() +55
System.Web.UI.WebControls.TextBox.System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent() +10
System.Web.UI.Page.RaiseChangedEvents() +165
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Apr 27, 2010
I have seen a number of posts on this, but none that quite serve my needs. I have a GridView with template fields. I use postback because when a value is entered in one field a calculation is done to supply the value in another field. I simply loop through all the rows after each postback (there are not many so it is fast). I do not use a select command or button to select a row. After postback I do not know how to return the focus to the row that was being used. I can return the focus to the first row just by using gridview1.focus.
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Jan 24, 2011
In trying to improve 'user experience' with a GridView, I have an administrative application where a GridView is displaying records from a SQL table. One of the columns is a bit column, and is displayed as a checkbox in the GridView. I want the user to be able to simply check or uncheck the box while viewing the GridView, and the value in that column for that record is immediately updated. So I set AutoPostBack="true" on the CheckBox in the GridView's Template Field.
But tests are indicating that the column value is not actually getting changed, even though the page appears to post back and displays the newly checked (or unchecked) checkbox correctly. But if I check the SQL table directly the column's value has not changed.
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Sep 8, 2010
I have a checkbox placed inside a gridview:
<GridView><asp:TemplateField HeaderText="Driver"> <ItemTemplate> <asp:CheckBox ID="CheckBoxDriver" AutoPostBack="true" OnCheckedChanged="GridView_Persons_SelectedIndexChanged" ValidationGroup='<%# Eval("ID") + "-" +((GridViewRow)Container).RowIndex %>' CssClass="CXDriver" runat="server" Checked='false' /> </ItemTemplate> </GridView>
For example: A listViewItem 1 has 3 drivers are checked, A listViewItem 2 has 2 drivers are checked.
Therefore, if changing the selectedIndex of the list, the checkbox indexChanged event will be fired.
How could I disable the autopostback of the checkbox during the listview item changed.
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Nov 2, 2010
Currently I'm designing a web page which will be used for touch screen device. In my gridView it got one button ItemField column so when this button is clicked it will update another column value. So if I got more than 30 records and I want to update the last record I need to scroll down the page to the end and do update. Up to here everything is fine. But the problem is after I have successfully updated the last record; the page will refresh and back to the first record again. So when user wants to view record which they updated they got to scroll down and check. So I just want to know is there any way that allow me to set focus on the updated record. So each time user done update they can straight a way check the result and no need to scroll down.Cos this will be very troublesome for them.
I got think of using Paging, but the page number size is too small ,I don't think it is good to use on touch screen device.
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Mar 24, 2010
I have an windows application, in this i have one grid view and am filling the grid view rows dynamically.
Now I would like to focus the last row of the grid while filling in which it is focusing the first row in the grid.
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Apr 9, 2010
I am trying to set the focus to a control in a gridview (QTY).
<asp:TemplateField HeaderText="Quantity Needed">
<ItemTemplate>
<asp:Label ID="id" Text='<%# Eval("id") %>' runat="server" Visible="false" />
<asp:TextBox Width="30px" MaxLength="4" ID="QTY" runat="server" AutoPostBack="true"
OnTextChanged="check_qty" />
</ItemTemplate>
</asp:TemplateField>
I need to set the focus on the QTY control in the next row in check_qty. I was able to set the focus on the control in the current row by using:
row.FindControl("QTY").Focus()
but I need to set it on QTY in the next row.
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Feb 2, 2010
I have a gridview placed on the Panel(Scrollbars set to Both).
If I click on Edit button of the gridview for example Row number 100 then the focus of the page goes to the top of page and I always scroll down to the particular record to make changes.
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Feb 1, 2011
I have a gridview that contains about 35 rows. a user has to scroll down the page to view the rows. when a user click edit. the row goes to edit mode, however, the page goes up to row 1, I need to keep the row visible to the user upon clicking the edit mode. how can I apply such a thing.
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Jan 6, 2010
I have a text box in a gridview that is causing some problems with user input. The first time the user opens the page the gridview is populated with zero's in all rows textboxes. I set the focus to the first textbox in the Page_Load event but the cursor is placed to the left of the zero and when some users enter data they don't realize the zero doesn't go away so the first row ends up wrong. Once the tab or enter key is hit and the next row is selected, the zero is "selected", for lack of a better term like when the insert key is predded, and once the user starts typing only the new value remains. Is there a way to make the zero in the first row "selected" ?
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Oct 1, 2010
I have a GridView that has approximately 800 records. I have a search feature that finds a record and focuses to it. When I click Edit for that record, the Gridview flashes and goes back to the 1st row. If I search for the record again it is in edit mode. Is there some setting to keep focus where it is? I added the following code to try and keep focus, but it doesn't work.
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May 1, 2010
I have a gridview with edit functionality and using the EditItemTemplate section. I am trying to set focus to a textbox when user selects the edit mode.
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Apr 27, 2016
When I select the item in 1st dropdownlist, values are fetched from database and want to display in second dropdownlist... but the autopostback is not working for the 1st dropdownlist..
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Jan 19, 2010
i have two dropdownlist in my webform both are filled dynamically in the page_load event
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