Web Forms :: Visible False Loses Data On Postback?
Feb 1, 2011
I have the following simple code:
[Code]....
So when i select "Yes" from the first drop down, the "hiddenDetail" label becomes visible and when i select "No" from q1 the "hiddenDetail" label becomes invisible.The problem is that because i am using AutoPostBack when you select "No" the "hiddenDetail" loses its children (i.e. the label inside it) which is obvious why but i am wondering, is there anyway i can make the "hiddenDetail" invisible (sort of like display:none in style) in VB without losing its children. Or is my only option to work with this in
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Mar 21, 2011
I have a form with a ton of gridview controls on it. All of which are driven by a dropdown list control. When I select a value from the dropdown list control it populates the 5 gridview controls with data from the database.If there are no rows associated with the record from the dropdown list then I am going to set the visible property of all of the gridview cotrols to false.
I know how to set the property I just need to know where I would set it and what I would check.I can put my code in the selectedindexchanged event for the dropdownlist control but how do I check to see if there are no rows associated with that value? Maybe some sort of If gridview1_rowdatabound = 0 then...
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Jan 14, 2011
I have a listview that renders like this:
yearsexp: 4
desc: a description text on the row databound, if there is no value for yearsexp or desc, I would like to make it not visible. The other one needs to still be visible. So far I have
[Code]....
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Feb 21, 2010
I have a gridview with columns 'Edit', 'Delete', 'View Results' and other details. The 'Edit' column opens a modal popup to edit the record. The 'View Result' column is in a login view and this column is only visible to users belonging to the group 'Manager' as below:
[Code]....
When the page is first loaded, the hyperlinks are displayed correctly. however, after editing a record and saving the changes, the 'View Results' column loses the hyperlink.
I tried creating a temp hyperlink column outside a loginview control and this seems to work correctly.
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Aug 10, 2010
<asp:ButtonField Text="Void" ButtonType="Link" CommandName="Void" />
' RowCommand
Dim f_iIndex As Integer = Convert.ToInt32(e.CommandArgument)
Dim f_oSelectedRow As GridViewRow = grdMeterCorrection.Rows(f_iIndex)
Dim f_oCertIdCell As TableCell = f_oSelectedRow.Cells(11)
Dim f_sCertId As String = f_oCertIdCell.Text.Trim
If e.CommandName.ToLower = "void" Then
Dim f_bVoidRet As Boolean = VoidCert(f_sCertId)
End If
The problem is the CertId field in the GridView has visible set to false. I think this makes the value unaccessable to the RowCommand.
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Feb 10, 2010
I'm trying to make my TD visible or not inside a repeater. I keep getting an error "Object reference not set to an instance of an object". here is my code:
[Code]....
and my code behind:
[Code]....
I know it has something to do with how my findcontrol code is written, but I can't figure it out.
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Mar 31, 2010
I have template field named "MenuItemId" which is visible false and in that i have taken hidden field (Htmlinputhidden) control. my requirement is i dont want to show that MenuItemId in the gridview but want to access the value of that column (i.e. hidden field). I am creating node of the xml from the headertext.
[Code]....
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Apr 9, 2010
I have a database field called ImageLocation, I have the ImageUrl property bound to: Eval("ImageLocation", "{0}")I would like to bind the Visble property to false if the ImageLocation is null data. I can not figure out how to set the control properly, currently the Datalist shows me all the data and when the image location is null it shows me the name of the Hyperlink control which happens to be Hyperlink2.
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Aug 23, 2010
I have a problem displaying data in a Grid View control when set a row to visible = false when a certain condition is true.
For example, if a DataRowData value has a condition set to true (custom in table) I set the visible property to false, so the data row will not be visible at run time.
The problem is that I'm using paging (10 rows per page) and if 8 of those rows fall into the true condition that won't show the row, that grid view page will only show two rows of data in page 1. The worst scenario is that if I go to page 2 of the grid view and all the rows (10) fall into the true condition, that grid view page will not show any data at all.
How can I show 10 rows of data at all times in a gridview? In other words, I would like to just show the visible rows at all times.
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Jan 10, 2010
I have a gridview that serves as a confirmation for user input in a previous form from a previous page. The grid is databound to a temporary table where I store the user's initial selections. The user can confirm what they had submitted, (which may be more than one row of information, up to three classes) or go back and change. When they hit the confirm button, I loop through the gridview and enter a row in a permanent database for each row in the gridview. This works great.
However, I don't want the gridview to display all of the columns that are actually in the temp database, because I'm carrying over 'usersubmitted, datesubmitted', etc, from the previous page for each class selected and this is redundant. (I do need to use all of the columns when they submit, however, to make a new row with complete information for each selected class in the permanent database) So, when I set the usersubmitted column visible false, for example, in the gridview, the dataset table adapter insert function fails with a data type mismatch error. I'm assuming becuase the column has to be visible, becuase when I make it visible again it works.
Can you loop through a gridview and call on cells in columns that are not visible?
The first page is like this:
the user fills out his info once in text boxes
name ____
address____
then selects up to three classes in dropdowns:
class one dropdown ...
class two dropdown....
for each dropdown, I insert name, address, class selected into a temp db Second page.
Gridview should display only classes selected, one row for each, and not
name address class selected
name address class selected
then when they submit, I insert
name address class selected
name address class selected
one row for each in permanant database
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Apr 15, 2010
I have a problem that in DetailsView Edit Mode, if I go to edit fields, and set a fields visible property to false, when I update the record through the built in update options it sends a null value. If I change the field back to visible, it passes the data just fine.
Consequently, I tried just setting the field to Read Only = True, and got the same result even though the current values do show up in the edit mode, just read only.Is there anyway to hide the field but still allow it to pass the data it currently has "BACK" into the record.
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Oct 26, 2010
How can you access data in a GridView cell with Visible = false?
[code]...
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Jun 29, 2010
I've GridView with Template field as
<asp:TemplateField HeaderText="Review">
<ItemTemplate>
<asp:ImageButton ID="imgBtnReview" ImageUrl="~/images/agt_reload.png" runat="server" Visible="false" CommandName="Review" CommandArgument='<%#Eval("id")%>' />
</ItemTemplate>
</asp:TemplateField>
Gridview is bound to a table. If a row in table has price greater than zero then the above mentioned Imagebutton should br visible in that row only.
Is it possible to do so.
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May 20, 2010
I have an Objectdatasource configured with Select, Insert, Update & Delete queries in a Dataset. This datasource is linked to my Gridview. I do not require all fields in the table to be displayed or updated in my grid so i have turned off the Visible property on several.
However, when i go into Edit mode and trigger the UPDATE to the database table, i get NULL values updated in the columns i set False for the Visible property.
How can i remove these columns from the GridView and the Edit mode and still have them UPDATE with their current values instead of being overwritten with NULL's?
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May 7, 2015
I am using gridview with sqldatasource , now i have a column
<asp:gridview ID="MyGrid" runat="server" AutoGenerateColumns="False" datakeynames="Seq"
DataSourceID="ExistingConsPhaseSource" >
<Columns>
<asp:boundfield datafield="Seq" headertext="Seq" readonly="True" Visible="False" sortexpression="Seq" />
<asp:templatefield headertext="Description" sortexpression="Description">
[Code] ....
I also have a button outside gridview , on its click event i want to delete all rows in a grid view. So far i have done like this :
protected void DelAllExisting_OnClick(object sender, EventArgs e) {
foreach (GridViewRow row in ExistingConsPhases.Rows) {
string query =
"UPDATE [dbo].[myTable] SET IsDeleted = 1, DeletedBy = @DeletedBy, DeletedDate = GETDATE(), DeletedByPrefix = @DelPrefix WHERE Seq = @Seq";
SqlCommand comm = new SqlCommand(query,_connection);
comm.Parameters.AddWithValue("@Seq", ???);
comm.ExecuteNonQuery();
_connection.Close();
}
}
What to type instead of ??? I want my bound field of Seq to be place here ? how ?
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Oct 7, 2010
Currently struggling with a problem that I've encountered variations on in the past. At the moment a worthwhile solution escapes me, but it seems such an obvious issue that I can't help wondering whether or not there's a "best practice" approach I should adopt.Without code, here's the issues in a nutshell:
page has databound control (a repeater) which isn't populated until user inputs data and clicks a button.Repeater item template contains a buttonUser clicks button, page posts back. On load, the repeater is actually empty so event is never handled because the originating control no longer existsGo back to the beginning of wretched cycle I've confirmed that this is the problem because if you provide the repeater with some static data on page load, everything works fine. But of course that's no use because it has to be populated dynamically.Is there a commonly approved way round this headache? I can store the data in session and re-use it on page load, but it seems terribly clumsy.
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Aug 12, 2010
I combined MVC and DD by creating a new DD project and adding the MVC stuff (references, routing, usings, etc). The list of tables on default.aspx (from DD) will show all tables, including the ones with [ScaffoldTable(false)]. The URL's of the tables with Scaffold==true have the expected form (DD/TableName/List.aspx). However, the URL's of the tables that should not be shown are in the form /Home/List?Table=TableName. If you leave out the MVC routing (Routes.MapRoute) then the tables with Scaffold(false) are not shown. Or you can leave out only the Parameter defaults.
My guess is that Dynamic Data determines if a table is visible by checking to see if a route can be made to for the List page. The DynamicDataRoute will not match because that will not generate a route if Scaffold==false. BUT THEN the MVC Route WILL match because of the Parameter defaults at the end. Am I correct and is this a bug or am I completely missing something here? EDIT: I fixed it by adding filtering the VisibleTables on Scaffold like this, but that's a workaround...
System.Collections.IList visibleTables =
MvcApplication.DefaultModel.VisibleTables.Where(o=>o.Scaffold==true).ToList();
My RegisterRoutes in global.asax.cs:
public static void RegisterRoutes(RouteCollection routes)
{
DefaultModel.RegisterContext(typeof(studiebase2Entities), new ContextConfiguration() { ScaffoldAllTables = false });
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.Add(new DynamicDataRoute("DD/{table}/{action}.aspx")
{
Constraints = new RouteValueDictionary(new { action = "List|Details|Edit|Insert" }),
Model = DefaultModel
});
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
);
}
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Aug 30, 2012
i have gridview in my page
i don't want show header in my gridview i search all property of this control but i didn't find anything
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Sep 11, 2010
I'm having a little problem with my file uploading. Does anybody know how to maintain the value in the FileUpload control between server posts?
I have a form which, among other things, uploads a file. I am using an ileUpload control (created dynamically) to let a user browse their PC for a file and then using the SaveAs method to upload the file to the server.When I'm selecting a file and Click on Next button for processing then selected file is lost.
Same is happening with me with HtmlTextArea (dynamically generated) , the problem was that I was not again re-initializing the controls after postback. What I did is re-initialized it in Init method of placeholder (as I have created/placed all dynamic controls in placeholder ).
But this thing is not working for fileupload control. I found solution in one of the forum is that "use hiddenField Control to transfer the selected file from the client to server"but this mechanism will only help to retain the name of file
in a hidden variable and the FileUpload1.PostedFile.SaveAs(filename) will not work bcz of absense of object (fileupload1).
here is code:
[Code]....
I have done almost the same in different test project , it works . I dont know whats wrong?
[Code]....
How to correct this?
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Jan 28, 2010
I am creating a control that inherits from the RadioButton, so that I can set the GroupName property manually. Everything is working okay apart from the fact that when the page posts back, the RadioButton becomes unchecked if it has previously been checked. This is the first time I've tried inheriting from controls, so must be doing something really silly. I would welcome anyone helping me to improve my code so that the control's Checked value persists through postbacks. I am causing a postback using a button, not the actual RadioButton itself, if that makes any difference. Here is my code:
[Code]....
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May 7, 2015
radiobuttonlist Value is not saved when saving on where the problem is?
<form id="form1" runat="server"> <div> <asp:RadioButtonList ID="rblShippers" runat="server"> </asp:RadioButtonList> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /> </div> </form>
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;public partial class _Default : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) {
string strConnString = "data source=.;initial catalog=saeed;integrated security=true"; using (SqlConnection con = new SqlConnection(strConnString)) {
[CODE]...
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Oct 11, 2010
I have four columns in gridview. EmpId,EmpName,EmpSal,EmpDept.
I want to display the complete information on another page,for this am sending empId to other page through RowCommand.
Now I dont want to display my EmpId Column in GridView but I want to access it .
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Mar 31, 2011
I am basically trying to check the contents of a field in a data base (Course) to determine if a button (btnMisfills) shoulf be displayed for a specific user. I am sure ther are probably better way of doing this, and any suggestions would be appreciated. However I am using the few tools I know how. Everything works as expected as long as the DetailsView is visible, but I have no need to display the detailsView. When I change the detailsView to visible = false, my logic does not work. Apparently visible = false means the detailsview is not created. If this is true, how else can I check for the contents of the course field?s there a way to check a field in the sqldatasource?
[Code]....
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Mar 8, 2010
I want to making another dropdownlist visible=false when clicking in dropdownlist on the same detailsview?
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Sep 17, 2010
I have the code below, it all works if the BoundField is set to Visible = "true", but if i change it to "false" then my conditions are not being met and page logic doesnt work.
What am i doing wrong?
[Code]....
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