Forms Data Controls :: Gridview Update - Bound Fields Visible Set To False Not Working?
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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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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Sep 26, 2010
I have a GridView, and I want Column1 to be equal to datatable data (filled by a SqlDataAdapter). Then I have two other fields by the SqlDataAdapter (first name, last name), and I want to have those two fields combined to form Column2. I have a TemplateField for my GridView that combines the first name and last name with Eval()'s, but the GridView places this combined field TemplateField and puts it as the first column.
How can I do this so that TemplateField can go in between fields that are databound?
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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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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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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 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 29, 2010
I am using gridview to display some columns with autogenerate column as 'true' and not added boundfields,headers.
And i am used stored preocedure for data source in gridview and i used dataset for gridview databind.
The gridview columns comes dynamically for each time.
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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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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 3, 2010
I am having a hard time updating from my gridview based the value that I am setting in the datakeynames it is the Ucc field I keep getting and index out of range exception on the e.keys[0]. I have done this before so I am confused what I am missing here.
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Sep 15, 2010
I am having a strange problem. I put on a Gridview on my aspx page. I also data bound it to a table from my SQL server.
Other than that I wanted to put in the Edit, Update and Cancel functionality so I also put in this from the Gridview Smart Tag.
Following is the gridview aspx code can anyone tell me what I am missing here?
[Code]....
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Feb 17, 2010
Bug: UPDATE command Does NOT Work as Expected on a DataBound GridView This was tested in VS2005 and VS2008
Took a while to figure this out - A simple recurse thru Page Controls Makes UPDATE Not Work as expected.
To Recreate this bug:
A simple Gridview bound to an Objectdatasource on a page with ALLOWEDIT ALLOWDELETE
If one inserts some code (a function call in my example) that just recurses the PAGE controls in either the PAGE_PREINIT, PAGE_INIT, PAGE_INITCOMPLETE events,
Then the UPDATE does not FIRE! and After Pressing UPDATE the GRID does not BIND! You Get A Blank Page - Funny thing tought it's only the UPDATE Functionality that gets affected by this - Everything else works fine including EDIT & DELETE.
If the same function call (recurse thru page controls) is added in the PAGE_PRELOAD, PAGE_LOAD -- Then the UPDATE starts working again as expected.
BELOW Is SAMPLE Code using the NORTHWIND DB Products Table and a Typed DATASET.XSD - You can use your own datasource for the ObjectDatasource - (Note I took out the Foreingkey constraint in products table from Nortwind for delete to work)
NOTE: One should be able to just cut and paste the function PAGECONTROLS_RECURSETEST on any working form that has a bound Gridview with Update functionality and you should be able recreate the bug that way by calling the function from the different page_events
[Code]....
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Sep 3, 2010
Ive got a list of records in a gridview (from an SQLDataSource) where a field value is set to True. I've also added a "reset" button in a template field at the start of the row in the Gridview.
What I would like to do is allow the user to click the reset button on a particular row and 'reset' the true value to 'false' (updating the source data).
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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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Nov 16, 2010
I have a query expression which I am binding to a GridView in Page_Load. The data I want to capture in the SelectedIndexChaned event is in a BoundField defined thus:
<asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True"
SortExpression="ID" Visible="False" />
If I set Visible="True", I have no trouble getting this data. Is there a way to hide the ID field and still get the data?
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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 13, 2010
I have a Gridview showing the data on one of my tables, and when I try to edit the data in one of the columns after I click update, rather than updating the record with the new value I typed in, the rows become null as in, everything in the row I just edited disappears. This inmediatly makes my application crash because one of the fields in my table (IssueDescription) doesn't allows null values.
This is the code, which is actually 100% auto-generated from when I created the GridView control and specified in the options to implement update, delete, edit options.
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False" DataKeyNames="ticketNum"
DataSourceID="SqlDataSource1" [code].....
What is making the rows turn into null after the update? I did some research and tried to define the Update behaviour myself using RowUpdating function. After hours of learning how to use it I got it to "work", but because the Update turns everything to null when it updates, the sqlconnection command I use to do the query sends null anyways. I can paste the C# code if you'd like to see it, though I'd rather not use it if the auto-generated by asp above can be fixed instead.
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Oct 29, 2010
I'm using Visual Web Developer 2010 against SQL Server 2008 R2.
I have a number of GridViews and FormViews working now, with edit functionality. However I have one field in my main database table that is of type 'Text'. With that one field, the edits won't take. I click Edit, change the text in the GridView, and click Update, but it just reverts back to the unchanged text.
It seems like I've tried everything. Is there a way to make that work without having to code it the hard way with a Textarea control?
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Aug 30, 2010
Im a newbie, hoping any experts can lend a hand. I have a gridview table connected to an SQL database. I have auto generated the update and delete methods to allow me to edit the gridview.
However, I would like the editable data in the gridview to be replaced by a selectable drop-down box. The drop down box is referencing an sql table for selection.
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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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