State Management :: How To Make An Image Control (dynamically Added To A GridView Column In It's RowDataBound Event)
Mar 28, 2010
I have a gridview that on it's RowDataBound event I dynamically add Image Controls to some columns.
The problem is that I lose these images on the next PostBack.
OBS: The GridView's EnableViewState propertie is already set to true
I know about the page lifecycle, but how can I persist these images if I have to add them on the RowDataBound event?
In addittion, if I add a static TemplateColumn with an Image Control and I set it's ImageUrl propertie inside the RowDataBound event it will obviously persist between postbacks. The problem is that I don't know how many columns with images I'll have, it's defined on the datasource.
[Code]....
View 8 Replies
Similar Messages:
Feb 17, 2014
According to my columns value True / False I want to change the button Text which is on my GridView
I wrote the below code for it but it is not working :
while (Global.reader.Read())
{
if (Global.reader["Click"].Equals(true))
{
Button btnSold = (Button)e.Row.Cells[9].Controls[0];
[Code] .....
View 1 Replies
May 7, 2015
i have made a gridview which contains three fields, two textboxes and one combo box. ComboBox fetchs data from table(SQL) and when a combox box triggers, data related to combo must be added in two boxes. i did this throw another button, but i want this to be trigger directly when it clicks.
View 1 Replies
May 23, 2010
I am writing a search results page for an airline booking system. I have Next/Previous buttons to view flights for the next or previous days. The way i have done my results grid is that i use an HtmlTable and dynamically add rows, cells and controls into the cells. This gives ultimate flexibility given that we can add any control type we want and have it function as it does everywhere else in the system. As you should be aware - i must recreate these controls each time the page is reloaded (in the page_init event) since asp does not handle this automatically.
When they go next/previous it refreshes the flight data and re-populates the grids. If they select a flight in the return grid (by checking the RadioButton), and go next on the FIRST leg grid, the selection of the return leg stays the same after the postback
- which is great. But the problem is, if the flight they selected on the return leg is no longer available it will not create the control and i get the following error;
"Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request."
Is there any way to tell asp.net that if you do not find the control anymore, simply ignore it rather than throwing the error? The nature of this design is that there potentioally WILL be a different layout after the page is posted back.
View 7 Replies
Feb 8, 2010
I dymamically add checkBoxList to the page. How can I get checked items from it without adding it again?
View 7 Replies
Feb 23, 2011
While I am using a "Telerik" control here it shouldn't be any different I guess;
[code]....
What happens is that the control is created and rendered;
When I change value in the Combo box a Post-Back happens.
HOWEVER, the event RadComboBoxSelectedIndexChanged does not fire. Also when I am back at the page the new value is not saved; Obviously, i recreate the control every time. If I don't I get a ViewState error. Seems to me that there some ViewState management problem, but I cannot identify it...
View 2 Replies
Mar 30, 2011
I'm creating an ASP.NET control dynamically based on a value selected in a dropdown; for instance the field can be a textbox or a checkbox (for now), and then it gets added to a placeholder control. However, I'm unsure how to retrieve the value - using the placeholder's FindControl method returns null although I'm specifying the ID when I create the control.
Here's my code:
[code]....
View 2 Replies
Apr 26, 2010
I have a user control say SearchVendor.ascx which contains 4 buttons a gridview and another user control. I need to load the control dynamically actually as a modal pop up
I get this code
var uc = Page.LoadControl("~/blah/VendorProductSearch.ascx") as VPSearch;
uc.ShowVPSearch(true);
_tempPlaceHolder.Controls.Add(uc);
it works fine the control gets loaded properly but onclick of any button the second time the control disappears ?
I want the dynamically added control to remain until the user clicks on the cancel button
View 2 Replies
Jul 23, 2010
How can I get the placement of dynamically added control in any page event.
View 6 Replies
Apr 14, 2010
I have a control that handles commenting. In this control, I have set a delegate event handler for sending an email.
I then have various types of controls, e.g. blog, articles etc, each of which may or may not have the commenting control added (which is done dynamically with me not knowing the id's), i.e. the commenting control is added outside this control. Each of these controls handles it's emailing differently(hence the event).
What I'm trying to determine, is how to assign the event in the parent control. At the moment, I'm having to recursively search through all the controls on the page until I find the comment control, and set it that way. Example below explains:
COMMENTING CONTROL
public delegate void Commenting_OnSendEmail();
public partial class Commenting : UserControl
{
public Commenting_OnSendEmail OnComment_SendEmail();
private void Page_Load(object sender, EventArgs e)
{
if(OnComment_SendEmail != null)
{
OnComment_SendEmail();
}
}
}
PARENT CONTROL
public partial class Blog : UserControl
{
private void Page_Load(object sender, EventArgs e)
{
Commenting comControl = (Commenting)this.FindControl<Commenting>(this);
if(comControl != null)
{
comCtrol.OnComment_SendEmail += new Commenting_OnSendMail(Blog_Comment_OnSendEmail);
}
}
}
EDIT:
The reason I ask is that if I search from this.Page as the initial control, I am worried about time taken to search down the control tree to find it. Each different type of page would be different in how many control it would have. On some testing, it returns back quite quickly the result.
View 1 Replies
Jun 8, 2010
In my web application, I have to load different Master pages depending on the user log-in information. When I say different, I mean not just the colors but a whole new look[including navigation options]. So I am using 2 Master pages [one of them is set as default] and depending on the user information the other page will be used.
I got it to work by storing the user information in a Session variable and applying the master page dynamically using the Page_PreInit event. But the issue is, if I hit the back
button, sometimes [yeah, only sometimes !!!] the master page is reset to the default page. Initially I thought it is a Session timeout issue. But it isn't, as some of the session variables still have data. Can anyone explain whats actually happening?
View 4 Replies
Mar 7, 2010
I have database status field Bit(0/1) this values binding to gridview column. i want to show record status instead of 0 and 1 display open or close
View 5 Replies
Feb 27, 2011
i have a gridview and dynamically creating columns and bounding using datareader source.
HyperLinkField hFld = new HyperLinkField();
hFld.DataTextField = dataReader.GetValue(1).ToString();
hFld.HeaderText = "Doc No";//dataReader.GetValue(2).ToString();
i want to to replace the hyperlinkfield with a template field that contains a hyperlink WITH ID where hyperlinkfield does not have ID and be bound to the same datasource above because i want to make the abililty to set the navigate url attribute using rowdatabound
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
HyperLink hFld = (HyperLink)e.Row.FindControl("hyperlinkID");
lnkTicket.NavigateUrl =
"javascript:w=window.open("+e.row.cells[2].text+".pdf','','width=400,height=400')";
}
}
View 4 Replies
Jul 24, 2010
am adding control dynamically in button click event in asp .net i have one more button when i clicked the added control is disappeared .
View 5 Replies
Jun 17, 2010
I want to know is there any other way to reset the sessions in page load?after delete the controls
i tried with Session.Abandon() -it kills all the session in page
this my code
[code]....
View 2 Replies
Jan 9, 2011
i want to upload picture throw FileUpload control and then store it in session, after store in session i want to read it out to image control and insert to database.
View 3 Replies
Jul 19, 2010
why the gridview RowDataBound event fires during a select command. I only expect it to run when the gridview is being populated with data. Is there some way to stop it from running when the select command is triggered?
View 3 Replies
Apr 21, 2010
Our Web Server rebooted due to power failure. Now ASP.Net State service would not start logging the following error on the server:
Unable to make the Session State Request to the session state server. Last known phase=Sending request to the state server
how to bring back the ASP.Net State service.
View 2 Replies
Jul 31, 2013
How can I make image control through C# coding in gridview column?? and then display image in it.
View 1 Replies
Feb 8, 2010
I have two gridview in a single webform, I need to fire one gridview RowDataBound event from another one gridview's RowCommand.
View 3 Replies
Oct 1, 2010
i have one method which save datatable in viewstate.i am calling this method in. page_load2. Prerenderthe page was every heavy,i did tracing of page i found due to calling of method from preprnder it doubled the viewstate sizewhat was the reseon behind this.
View 2 Replies
Feb 24, 2010
I have created a gridview in code behind (as in its not physically present on the page). I want to know how to call it's rowdatabound event - as data is being bound to it. There happens to be a Gv.RowDataBound function, but how do I use it? (I want the same functionality as what the asp:gridview control has for its onrowdatabind attribute...)
GridView Gv = new GridView();
Gv.AutoGenerateColumns = false;
BoundField one = new BoundField();
one.DataField = "one";
[code]...
View 2 Replies
Dec 12, 2010
in asp.net we can handle the RowDataBound event of the GridView control. this event fires when every row is added to the gridview.
i want to be able to handle this event in the gridview in a winforms application but i cannot find a similar event. my question is what is the event name that allows me to do the same as RowDataBound in asp.net?
View 1 Replies
Mar 31, 2011
When u have a gridview(lets say gridview1) and u associate an event
OnRowDataBound = "gridView1_RowDatabound"
and u usually start the event method as follows
protected void gridView1_RowDatabound(object sender, GridViewRowEventArgs e){
if (e.Row.RowType == DataControlRowType.DataRow){
do something..
}
}
Why do u have to check again if the row is data row, as i understand it gridview1_rowdatabound event occurs only when the rows are getting bound by the datasource u supplied. Why do u perform again this additional checking ?
View 1 Replies
Jan 25, 2013
I bound the gridview having some fields(ID, StudName, City) and Display Button. When I click on the Disply button I approve the student and updation will happen.
Bu what happen the column ID is not in the sequence. Sometime it displays 1,2,3,4,5,6 ... next time it will display 7,8,9,10,11.... I want a sequence for the column ID. For that I used :
<%# Container.DataItemIndex+1 %>
and it is working fine.. But again I realize that these numbers are generating at runtime and i can't refer to that student. Also I don't want to display ID column on the grid view but I want to use on runtime generated column. [ i am using RowCommand for ID column ] How it is possible?
View 1 Replies