Forms Data Controls :: Evaluating Object ID Within Gridview For Scripting
Aug 17, 2010
I'm setting up a fairly complex gridview, and running into an issue with allowing some keyboard shortcuts to cause a submission postback. I'm hooking the onkeydown event on all of the editable elements within my gridview (in edit mode, as well as a separate-but-similar set of elements in the footer, used for row insertion), and calling the following function:
[Code]....
Here is the definition of LinkButton1, which is within a TemplateField in MasterGridView:
[Code]....
The gridview is not populated until after the user has made some input to the page, so I can't just refer directly to MasterGridView.SelectedRow.FindControl("LinkButton1").UniqueID for my eventTarget within the PostBackOptions (if I run this right now, it'll evaluate to "not initialized". But, I don't know how I could get it to recheck the value after the page has been created. There's gotta be a better way to make this work.
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Similar Messages:
Jul 20, 2010
I have a table structure such as this:
Bank_name | Share_date | Share_Price
Skye Bank | 2010-07-19 |6.99
FCMB | 2010-07-19 |7.99
Skye Bank | 2010-07-20 | 7.79
FCMB |2010-07-20 | 7.44
What I need to do is to compare the values for the previous day to see whether it is greater than today's and then return an image in an Image templatefield in a gridview. Below is my gridview:
[Code]....
Basically, the imgUrl method should return the correct indication in the gridview image template field. For instance if the sprice(which is today's values) is greater then the previous an uparrow should appear. However, I notice that the conditions is not evaluating correctly, for instance the Bank_Name FCMB in the table still returns an uparrow even when its share price is down from the previous day value.
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Jun 23, 2010
I have a simple method which takes an Object and return string "No" or "Yes". Basically I want to display "Yes" or "No" when a bool value of 0 or 1 is there
<asp:TextBox ID="TextBox3" runat="server" MaxLength="50" Width="150px" Text='<%# Checkvalue(Eval("AustResident")) %>' />
But everytime there is a 1 passed to the CheckValue which in the debug shows as true, It never evaluates being equal to "true" what am I doing wrong? My Checkvalue is always returning "No" no matter what I pass.
protected string Checkvalue(object obj)
{
if (obj != null)
{
if (obj.Equals("true"))
{
return "Yes";
}
else
{
return "No";
}
}
else
{
return "No";
}
}
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Mar 2, 2010
I have a boolean column in a datagrid that I would like to display as red/green image (I have already created these) instead of false/true. Or maybe I could display the "True" in green text and "False" in red text. Can someone point me in the right direction?
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Dec 10, 2010
I have an asp:label field for and expire date that should either display "Never" if the database field ([msDS-UserDontExpirePassword] this is a bit - true/false - field) is True, or otherwise display a date (pwdExpireDate).
My code doesn't throw any errors but I can' fully test it without putting it into production. Can someone tell me if this is correct? Also, there is no code-behind and I can't use code behind for this.
Here's the code:
The label: <asp:Label ID="lbUserPWExpireDate" Text='<%# ((bool)(Eval("[msDS-UserDontExpirePassword]"))==true ? "Never" : Eval("pwdExpireDate", "{0:M/dd/yyyy}")) %>' Runat="Server"/>
The query: <asp:SqlDataSource ID="GetUserExpireDate" runat="server" ConnectionString="<%$ ConnectionStrings:USER_PREFERENCESConnectionString %>" SelectCommand="SELECT DATEADD(day, 59, pwdLastSetDateGMT) AS pwdExpireDate, [msDS-UserDontExpirePassword] FROM LDAP_Users WHERE mail = @USER_EMAIL_ADDRESS" OnSelecting="GetUserExpireDate_Selecting"> <SelectParameters> <asp:SessionParameter Name="USER_EMAIL_ADDRESS" SessionField="USER_EMAIL_ADDRESS" /> </SelectParameters></asp:SqlDataSource>
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Jun 21, 2010
I have a page with a detailsview. Not all the fields in the select statement in the connection are present in the detailsview. I'm not sure if that is relevant. But what I want is for the page to evaluate two bits of data from the record it is loading. I have one field called "Controlled" which is a bit field and a field called Username. I am getting the current user by using this code.
[Code]....
I want the page to run an evaluation that goes... if username<>curruser2 and controlled = true then
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Feb 1, 2010
I am trying to get the value of the id field in my gridview but I keep coming up with this error when i do selectedValue or selecteIndex
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
How do I get that id? What I am trying to do is when the user select that link it will delete that information from the database. Here's my code:
[Code]....
[Code]....
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Jul 10, 2010
I would like to enable/disable the field BagNo in my gridview, depending on the value of another field in the gridview called ScriptNo, when I click the edit button I get this message "Object reference not set to an instance of an object".
here is the code
Protected Sub GridView1_RowEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles GridView1.RowEditing
Dim row As GridViewRow = GridView1.Rows(e.NewEditIndex)
If DirectCast(row.FindControl("ScriptType"), TextBox).Text = "TTA" Then
[Code]....
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Dec 22, 2013
I am trying to implement the code URL...I have a database table with Integer type.Here is the running code line: Code in GridView:
<asp:TemplateField HeaderText="RegionNavn">
<ItemTemplate>
<%# Eval("RegionNavn")%>
</ItemTemplate>
<EditItemTemplate>
<asp:Label ID="lblRegionNavn" runat="server" Text='<%# Eval("RegionNavn")%>' Visible = "false"></asp:Label>
[code]...
On Edit Click, the DropDownList in the GridView brings the previously selected value.On Update Click, the error is: "System.FormatException: Input string was not in a correct format."
dCmd.Parameters.Add("@KystverketRegionID", SqlDbType.Int).Value = int.Parse(ddKystverketRegionID.SelectedValue);
When I use the following code:
ddlRegionNavn.DataTextField = "RegionNavn";
ddlRegionNavn.DataValueField = "RegionID"; // from RegionNavn to RegionID
On Edit Click, the DropDownList values in the GridView is not firing and the following error shows.Object reference not set to an instance of an object. How to implement the code when having a value of type Int ?
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May 30, 2013
I have this part in the Gridview.
<asp:TemplateField HeaderText="Student">
<ItemTemplate>
<asp:DropDownList ID="ddl" OnSelectedIndexChanged="ddl_IndexChanged" runat="server">
</asp:DropDownList>
[Code]....
After the change, when it is to bind data, I get this Exception message. Why?Object reference not set to an instance of an object.
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Oct 21, 2015
When I am executing the below code on Visual Studio 2008, then it is executing properly with out any error. But when i am executing it on Visual Studio 2012, then it showing me following error (System.NullReferenceException: Object reference not set to an instance of an object) at line 64
Why is it so?
.vb Code is below :
Imports System.Data.SqlClient
Imports System.Data
Partial Class grid
Inherits System.Web.UI.Page
Function constr() As String
Dim i As New IO.StreamReader(Server.MapPath("constr.config"))
[Code] ...
HTML code:
<asp:GridView ID="GridView1" runat="server" CellPadding="4" EmptyDataText="no record found" ForeColor="#333333" GridLines="None" AllowPaging="True" HorizontalAlign="Center" Width="303px" AutoGenerateColumns="False">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<EditRowStyle BackColor="#999999" HorizontalAlign="Center" VerticalAlign="Middle" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
[Code] ....
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Aug 30, 2013
I have a dropdownlist attached to a cell when edit is selected. I am using the following code to populate the drop down list with the value that is on the row.
dlBU.Items.FindByValue((e.Row.FindControl("lblBU") as Label).Text).Selected = true;
This works famously when I have a value in the cell. It fails when the cell has not yet been populated. Is there an if then clause that if the value of e.Row.findcontrol("lblBU") is null no default value?
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Mar 16, 2010
We have a GUI which runs on ASP.NET 2.0 framework (Client-Server model). From the support perspective how can one find whether the pages which are opening on GUI at any point of time is a server side scripting or Client side scripting.
The reason why I ask this is because I understand that some of the codes are executed by the browser such as Javascript. So, if there are such scripts which are handled by the client browser, how can one find out that it is the Client side scripting which is running at that moment.
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Jul 13, 2010
i have a list of contacts (generic list) and i bind a gridview to it, i get the list displayed on the griview that fine, now i'm trying to get a contact object when i click a button on the gridview (button is a template field) i want to get the object back from the generic list, not just an ID using data key names, even the index of it in the generic list will do.
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Oct 12, 2010
I would like to create a gridview that gets data from a datasource but doesn't display it in the normal fashion based on my table layout.
Example:
Table layout is:
Name Emp# Dept# Booking Code# AccessId
This is how it looks in the gridview but I would like it to look like:
Name: John Doe Dept#: 12
Booking Code#: 1234 Booking Code#: 67
AccessId: 33
What data object will give this?Gridview won't work I think.
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Apr 19, 2010
I am developing an ASP.Net 2.0 project that a call center will use for their scripting and data collection. Each screen will present the call center associate with a question and depending on their answer, will move on to the next screen. My question is what is the best practice for housing that data until the end of the scripting has been completed (i.e. in a Dataset or datatable), where should the storage container be declared and what's the best way to control the back button so it doesn't lose the data and try to repost?
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Mar 30, 2010
I have the web page that meet the problem. There exists a gridview and filtering. When Select all by using function A, it is OK. when Filter by using function B, it cannot filter and return no rows. When Select all again, it is OK. I have tested that function B can return the corrected filtered rows. But when databind in the web page, it cannot show and no error?
<ContentTemplate>
<asp:GridView ID="gvwBOM" runat="server" DataKeyNames="ProductID"
AutoGenerateColumns="False" DataSourceID="objBOM" AllowPaging="True"
AllowSorting="True" BorderWidth="0px" CellPadding="3" CellSpacing="1" CssClass="grid-view"
OnRowCreated="gvwBOM_RowCreated"
OnRowCommand="gvwBOM_RowCommand"
OnDataBound="gvwBOM_DataBound" >
.........
<asp:ObjectDataSource ID="objBOM" runat="server"
SelectMethod="GetALTBOMs"
SelectCountMethod="GetALTBOMsCount"
EnablePaging="true"
SortParameterName="SortExpression"
TypeName="QI.BLL.WMS.ALTBOM" >
private void FillGridView(string filter)
{
if(filter == "0")
{
objDataSourceSelect="Afunction";
this.objBOM.SelectParameters.Clear();
}
else
{
objDataSourceSelect="Bfunction";
this.objBOM.SelectParameters.Clear();
this.objBOM.SelectParameters.Add("productSupplimentID", ddlTmp.SelectedValue);
}
this.objBOM.SelectMethod = objDataSourceSelect;
this.objBOM.SelectCountMethod = objDataSourceSelect + "Count";
this.gvwBOM.DataBind();
}
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Sep 29, 2010
I have a business class "Repositorio" with methods to create, update and delete objects.
i have a gridview and i need to fill it with the list of objects returned by these methods.
i used like this:
[Code]....
The problem is that i need to select, delete and edit itens, but the grid dont recognize the other methods...
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Oct 23, 2010
How do you Update a List(of Product) object with Gridview. i wish to either increase/decrease the item field named Quantity.
GridView3.DataSource = Product
GridView3.DataBind()
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Dec 8, 2010
I have an object datasource which is using Business object as a myconnection
The method i have defined under myconnection is
Publicstatic
DataTable getfn(String dtype,
String did,
String dprefix,
String dname)
{
datable table = new datatable(); then declared stored proceedure and defined parameters and assighned values
In the stored proceedure it has a query like select column1,coloumn2,coloumn3 As Call from table where
I need to take data from Call and display it to the gridview through object datasource .
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Feb 1, 2010
I am using a list of objects as a datasource and passing the object into a user control. I use the code outlined below
[code]...
When I try to access the object this way, it's null.
Funny thing, I can access the user control and all the control data in the user control, but the object (both in the gridview and passed to the user control) are null.
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Aug 26, 2010
I have a grid view which is populating with a data source through databind. And the Datasource is list of objects.Now when the user selected a row I want to get the object of that row. I'm trying to get the row like this.
GridViewRow
r = gvTruckCarrier.Rows[e.NewSelectedIndex];
DataRowView
drv = r.DataItem
as
DataRowView
;
but the drv value is null. Could any body tell me how to get the object of the selected row?
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Aug 2, 2010
If I have a list of contacts List<Contact> and a Contact object has an Office object property, I want to display a grid with columns
Contact Id, First Name, Last Name, Office Name
Where the sources of the above columns are respectively:
Contact.ContactId, Contact.FirstName, Contact.LastName, Contact.Office.OfficeName
I'm fine with binding the first 3, but was wondering whether I can bind the OfficeName using either Bind or Eval or whether I need to hook into the events and set the value there.
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Jan 5, 2010
I'm using a GridView and a LinQDataSource (Northwind database) and this error appears when website runs.
Here is my codes on aspx file and no codes in cs file.
[Code]....
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Mar 23, 2011
I am not sure why this is happening, but when I drop a GridView on the page and set up the SqlDataSource to point to a stored procedure - when I go to refresh the schema and add my session variable, I get an "Invalid object name #temp_table_Name" I have the appropriate read permissions on the tempdb. The user and password info are correct. The temp table is created in the stored procedure before executing the query.
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