Forms Data Controls :: Unable To Handle The Event OnItemDeleting - DetailsView Control?
Apr 25, 2010
I have GridView control and assosiated DetailView control.
When the record form GridView is seleted, I am showing the details on DetailView.
I have set the Auto generated delete button to true. And now I want to delete the record when someone clicks the Delete button from DetailView control.
Following is the HTML markup for my details view
<asp:DetailsView id="detailsPayments" runat="server" GridLines="Vertical" ForeColor="Black" CellPadding="4"
DataKeyNames="Id" Width="125px" Height="50px" HeaderText="Payment Details"
AutoGenerateRows="False" BorderStyle="None" BackColor="White" BorderColor="#DEDFDE" BorderWidth="1px"
AutoGenerateDeleteButton="True" OnItemDeleting="DeleteItem">
<FooterStyle BackColor="#CCCC99"></FooterStyle>
[Code]....
But not able to sucessful. Getting runtime exception as follows
Stack Trace:
[Code]....
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Similar Messages:
Feb 3, 2010
In the detailsview, I set a edit item template (a bounded dropdownlist control). But in database there are some data not set to a value (null). After clicking edit button in detailsview control I get the error about the value problem (Because after populating the dropdownlist, there is no item as null in it. )How to set dropdownlist selected index when the data is "null"?
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Feb 17, 2011
I have a detailsview control, which I use to enter data and save to the database. I am using object datasource to connect to the db. The detailsview control has autogenerateinsert = "true". When the insert is successfull, I want to set some variables and and to redirect the page to a different one. I don't know how to access the insert button click event of the detailsview to do it. If there is different solution like using <insertItemTemplate> and using custom linkbuttons.
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Feb 17, 2011
I have a detailsview control which I use to enter data and save to the database. The control is connected to the db through a objectdatasource. When the insert is successful, I want to set some variables and redirect the page to a different one. The detailsview control has AutoGenerateInsertButton="True". I don't know how to access the insert button click event in the code behind,
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Nov 18, 2010
I'm trying to use the DetailsView to make Updates. The problem is that it can't handle empty fields even though the underlying table field allows nulls.
I get a message like this if I change the "State" field to blank when doing an update
The parameterized query '(@Cust_ID int,@Cust_DL nvarchar(7),@DL_State nvarchar(2),@Last_N' expects the parameter '@State', which was not supplied.I'm using an object data source control which is calling the EditCustomer method in my Customer Class. I'm not sure how to fix this.
[Code]....
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Apr 7, 2010
DetailsView has 2 properties: AutoGenerateEditButton, AutoGenerateInsertButton for hadling Update and Insert. Is there any way I can use asp:Button or some other buttons to hadle the same tasks?
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Jan 13, 2010
I am unable to find any control in row editing event of gridview that i have put in edit template. I have to populate the dropdown control so that in editing the user can select value from the control.
How ever i can access the controls in row updating .But i need it in row editing event.
Here is the code.
[Code]....
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Jan 24, 2016
[URL] how to handle item command event in above example?
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Jan 13, 2010
I'm trying change mode in DetailsView but my program haven't running.
My code:
protected
void DetailsView1_ItemInserting(object sender,
DetailsViewInsertEventArgs e)
{
if(....)
{.........
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Oct 14, 2010
why I cannot select the date into the box.
[Code]....
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Aug 10, 2010
I am able to bind the first level nodes from the xml but not able to display the child nodes in the xml onto the detailsview on grid.
find my snippet below and help me in correcting the issue. I don't want to use the aspx page to bind the datasource.
[Code]....
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Nov 28, 2010
When you try to handle the ItemInserting event, the e.Values collection is empty. How do you add your fields to this collection manually?
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Sep 15, 2010
I have a slight issue I awas trying to fix for 2-3 days, but nothing I try works.
The scenario:
DetailsView control in edit mode, I pass parameters to the SqlDataSourceProducts (edit.aspx?id=2) and the data source selects the appropriate data and fills in the DetailsView form.
Except two drop down lists. These two DDLs (DDL2 and DDL3) are dependent on the previous DDL (DDL1) in the DetailsView.
when the selected value of the DDL1 changes, DDL2 and 3 change their lists and get bound to the database.
The problem is: when I edit something from the database, DDL2 and 3 appear empty and when I update any other field and leave these, they get blanked in the database.
My goal is to set the selected value of DDL2 and 3 to the values in the database WHERE ID = QueryStringField="id".
I can go for not binding the data unless the field is changed, but does not sound professional and user friendly.
code:
The SqlDataSource used to select the parameters from the table and populate the DetailsView
[Code]....
The code of the fields that hold the DDLs in the DetailsView control
[Code]....
The codebehind:
[Code]....
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Dec 16, 2010
I am using the DetailsView Control to read a LastUpdatedDate field (which can be null until an update is performed) from the database. The LastUpdatedDate is of type DateTime saved in UTC. With the DetailsView control, I can use the NullDisplayText property of the boundfield to safely display an custom message. However, once converted to a template field, that property is lost. Now, how would I display that message if the field is null as I am also formatting the date for display to show in local time.
[Code]....
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Dec 17, 2010
i have a gridview which consists of two columns.
1. name
2. radiobutton
when ever i click the radio button, the correspondng name should be saved in a variable in code behild(c#)
the gridview code looks as below:
[code].....
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Nov 15, 2010
how to handle click event of linkbutton in gridview in asp.net
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Mar 7, 2010
I have a DetailsView on my page, bounded throught ObjectDS (but I think it's not important). Some field is readonly for some users - based on role membership and other paramaters. I've tried to use the PreRender event to manage these field's readonly state. Everything is working - except one template field: when I click first time on Edit button the dropdown list stay readonly independently the role membership. When I click on Cancel than Edit again the control state is good. Code of PreRender event handler:
[Code]....
Environment:Web Developer 2008 Express .NET Fw. 3.5 Windows XP
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Aug 31, 2010
Using a listview control for the first time... I need a button for each item, and of course I need to handle the click event for the buttons... upon clicking a particular button I of course need to know which item the button is associated with so the appropriate action can be taken...
In VS, I can't select the button and see my list of available events in the properties window like is normally done for controls outside of templates like this... what do I need to do?
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Jan 3, 2010
I have a detailsview that is listing a users membership data. userid, username etc... I have the info in template fields. Basically I have also created a button named "Delete User" at the bottom of the page outside of the detailsview. (detailsview is only displaying one user's data). When the button_click event is called I would like to delete the user using the command
[Code]....
Where username is a string I pass through from the detailsview. I am using VB and can't seem to find a way to bring the username value over from the detailsview into the button_click event.
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Jan 2, 2010
I use ObjectDataSource and DetailsView for Updating records . my Bll input parameter method is an Object instead of regular parameter . So i though i could make my own ObjectParameter in ItemUpdating event of DetailsView and i need some modifiation on the data that user input on boudfield in detailsView . I don't know how to access BoundFiled data from ItemUpdating Method of DetailsView.
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Jun 16, 2010
A DetailsView in Insert mode has all fields cleared after events such as the following:
1. Clicking New.
2. Clicking Cancel.
3. Clicking Insert (if the default mode is Insert).
I have some fields linked to ViewState and they are populatd at PreRender event handler. I am wondring if there is a single place where all relevant ViewState elements can be cleared instead of doing this in all possible relevant handlers such as ItemCreated, ItemCanceled, ItemInserted, etc.
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Jan 25, 2010
I have problem with gridview sorting. I am using online example to sort a grid view. see the link [URL] but I always got an error "The gridview fired sorting event without handle" on this statement "helper.ApplyGroupSort();"
<table width="100%">
<tr>
<td colspan=3><asp:Label id="category_name" Runat="server"
ForeColor="#ff0000" Font-Bold=true /></td>
</tr>
<tr>
<td colspan="3" align="center" width="100%">
<asp:GridView ID="dg_drawings"
runat="server" AutoGenerateColumns="False" EnableViewState="False" CellPadding="5" CellSpacing="0" Width="90%"
>
<Columns>
<asp:BoundField DataField="Description"
SortExpression="Description" />
<asp:BoundField DataField="sub_description"
SortExpression="sub_description" />
<asp:BoundField DataField="drawing_id" InsertVisible="False"
ReadOnly="True"
SortExpression="drawing_id" />
<asp:BoundField DataField="DRAWING_DESCRIPTION"
SortExpression="DRAWING_DESCRIPTION" />
<asp:BoundField DataField="DWG_URL" SortExpression="DWG_URL" />
</Columns>
</asp:GridView>
</td>
</tr>
</table>
Here is my C# code
public partial class listDrawings : System.Web.UI.Page
{
admin _admin = new admin();
private GridViewHelper helper;
int categoryid = 0;
protected void Page_Load(object sender, EventArgs e)
{
if (Convert.ToString(Session["logged_in"]) == "1")
{
ph_header.Controls.Add(LoadControl("../controls/builder_header.ascx"));
}
else
{
ph_header.Controls.Add(LoadControl("../controls/header.ascx"));
}
/*if (Convert.ToString(Session["details_hit"]) != "1")
{
_admin.add_page_hit("Standard Details");
Session.Add("details_hit", "1");
}
*/
string categoryidStr = Request.QueryString["categoryid"];
string category = Request.QueryString["category"];
//int categoryid = 0;
if (categoryidStr != null)
{
categoryid = Convert.ToInt32(categoryidStr);
}
category_name.Visible = true;
category_name.Text = category + " Drawing Details";
get_category_drawings(categoryid);
}
protected void get_category_drawings(int categoryid)
{
OracleConnection myConn;
OracleCommand myCmd;
if (categoryid == 3)
{
myConn = new OracleConnection(ConfigurationManager.AppSettings.Get("oracle"));
myCmd = new OracleCommand("DRAWINGS.GET_STAR_SUB_DRAWINGS");
myCmd.CommandType = CommandType.StoredProcedure;
myCmd.Connection = myConn;
myCmd.Parameters.Add(new OracleParameter("iCATEGORY", OracleDbType.Int32, ParameterDirection.Input)).Value = categoryid;
myCmd.Parameters.Add(new OracleParameter("iSUB_CATEGORY", OracleDbType.Int32, ParameterDirection.Input)).Value = 0;
myCmd.Parameters.Add(new OracleParameter("oDRAWINGS", OracleDbType.RefCursor, ParameterDirection.Output));
}
else
{
myConn = new OracleConnection(ConfigurationManager.AppSettings.Get("oracle"));
myCmd = new OracleCommand("DRAWINGS.GET_STAR_DRAWINGS");
myCmd.CommandType = CommandType.StoredProcedure;
myCmd.Connection = myConn;
myCmd.Parameters.Add(new OracleParameter("iCATEGORY", OracleDbType.Int32, ParameterDirection.Input)).Value = categoryid;
myCmd.Parameters.Add(new OracleParameter("oDRAWINGS", OracleDbType.RefCursor, ParameterDirection.Output));
}
try
{
myConn.Open();
this.dg_drawings.DataSource = myCmd.ExecuteReader();
dg_drawings.DataBind();
helper = new GridViewHelper(this.dg_drawings);
string[] cols = new string[2];
cols[0] = "Description";
cols[1] = "sub_description";
helper.RegisterGroup(cols, true, true);
helper.ApplyGroupSort();
}
catch (OracleException ex)
{
if (categoryid == 3)
{
_admin.send_email("resources/listDrawings.aspx", "DRAWINGS.GET_STAR_SUB_DRAWINGS", ex.Message);
}
else
_admin.send_email("resources/listDrawings.aspx", "DRAWINGS.GET_STAR_DRAWINGS", ex.Message);
Response.Redirect("~/error.aspx");
}
finally
{
myCmd.Dispose();
myConn.Close();
myConn.Dispose();
}
}
}
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Feb 27, 2011
I have a user control that is dynamically added to a placeholder control inside an update panel in my main page. The user control has a linkbutton where I try to handle its Command event. The first time the link button is clicked after the user control loads, the form posts back but the command event handler does not execute, although the user control is still on the screen. The second and subsequent times the link button is clicked it works perfectly. When the user control first loads and I mouse over the link button, the browser status bar says: javascript: __doPostBack('ctl08$lbTest',''). After the first click, when I mouseover the link button the browser status bar shows javascript:__doPostBack('ctl07$lbTest',''). Why the changed in id, I can't figure but it must be why it is not hitting the event handler the first time it's clicked. Here is the cs code that loads the user control:
[Code]....
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Mar 7, 2010
I've got a dropdownlist control that the user can select an an employee name and that should then fill in the detailsview control with specific information about that employee.
My dropdownlist control works fine and I do have AutoPostBack set to true. For some reason my detailsview doesn't work. There's no error message. The detailsview control just doesn't show up.
Here's my code:
This is the sqldatasource control for the dropdownlist control:
[Code]....
This is the sqldatasource control for the detailsview control:
[Code]....
Dropdownlist control:
[Code]....
Detailsview control:
[Code]....
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Aug 2, 2013
I created nested gridview refereing asp.snippets.. Its working fine now requirement is to add Checkbox within child grid.. i added childgrid by
</asp:TemplateField>
<asp:TemplateField HeaderText="Approve">
<ItemTemplate>
[Code]...
How to find child grid check box control
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