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.
View 6 RepliesI populate a DetailsView from an ObjectDataSource that is coded in a class - meaning that the ods Select, Update, Insert and Delete are class methods. The selected record is set to come from a GridView.SelectedValue.
My problem is that when the page loads the code crashes. I am pretty sure I know why: the DetailsView is pulling from a class object and instead of using the existing class object it instansiates a new one which is empty.
Here is the details view code:
[Code]....
Here is the odsDetailsView_1:
[Code]....
As you can see from the code the odsDetailsView gets it's information from a class object "Match". The detailsview is not controlled by any code behind.
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]....
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]....
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 ?
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.
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] ....
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?
Does anyone know if it is possible to create a gridview from a class on a seperate webpage?
So I have webpage 1, that calls Class 1, in Class one there will be a Select Query that will call some info from a database and then return it to a gridview. The gridview wont work obviously as it is in the class and not on webpage 1.
Is there anyway to reference the fact I would like the gridview created on webpage1?
i try to increment value from class and display in a gridview as a number for the row.
<
asp:GridView
ID="GridView1"
runat="server">
[code]...
how can I change a checkboxfield in my Gridview from another class/file, my griedview name is gvUserEntry.
So what all do I need to do if I want to access this from another function
This is my grid view code....
<asp:GridView ID="gvUserEntry" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" BackColor="White" BorderColor="#999999" BorderStyle="Solid"
BorderWidth="1px" CellPadding="3" DataKeyNames="RowId" DataSourceID="SqlDataSource6"
EnableModelValidation="True" ForeColor="Black" GridLines="Vertical">
[Code]....
Nw i want to change the TempPwd checkboxfield from another aspx file namely NewUserLogin.aspx, So is it possible? The idea behind doing this is, as soon as the user enters a new password in the NewUserLogin.aspx page, the checkboxfield in the GridView of CustomerSetup.aspx file should be unset.
I think I've created and instantiated my first custom class. I'm pretty darn excited! Been reading up on it, I think I did it right but I'd like someone to double check. I'm trying to collect question ID's and associated answer values from a databound gridview and then insert them into the database.
I have two questions:
-Did I set up and instantiate the new class correctly? (also will need to access the class on other webpages)
-Am I ready for the next step of inserting into the Database with LINQ or is there something else I need to do?
[Code]....
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.
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();
}
I'm trying to change the CSS class of the row that is in edit mode. I've managed to get it working, but it only works for alternate rows. I'm totally stumped as to what could be causing it to behave like that. I've attached what I think is the relevant code below
[Code]....
protected void grdList_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.CssClass = "row";
}
if (e.Row.RowState == DataControlRowState.Edit)
{
e.Row.CssClass = "rowEdit";
}
}
.grdView tr.row:hover
{
background-color: #999999;
font-weight:bold;
}
.grdView tr.editRow
{
background-color: #999999;
font-weight:bold;
}
.rowEdit
{
background-color: #999999;
font-weight:bold;
}
.grdView .row .edit, .grdView .row .delete
{
display:none;
}
.grdView tr.row:hover td .edit, .grdView tr.row:hover td .delete
{
display:inline;
}
as i have developed one class file which inherits from gridview and as there is only one option to get that custom control on to the design like
<%@ Register Assembly="CustomGridNm" Namespace="CustomgridNm" TagPrefix="c1" %>
and
<c1:CustomGrid ID="gridCustom" runat="server" AllowSorting="true"
AutoGenerateColumns="false" AllowPaging="true"
onsorting="gridCustom_Sorting" onpageindexchanged="gridCustom_PageIndexChanged"
[code]...
Im writing a bit of code that will extract the contents of a gridview to excel. I have all the parts working except for one. In my page_load i fetch the data from the database and then have the user select some options which filters the data and then the gridview gets populated. The problem im having is that the Response call doesnt seem to get the data from the gridview if i enclose the database fetch command within if not page.ispostback in the page_load
I have some test pages where i just fetched the data from the database bound it in a gridview in the Page_load. then on a button click export the data in the gridview to excel. Works fine if i DONT enclose the fetch command within not page.ispostback but outputs an empty excel file if i do.
Now i have to use not page.ispostback in the actual webpages because the users have to make selections which will filter the original dataset. How do i get this to work?
The page is also implementing AJAX if that helps. Here's an example of what i have:
[Code]....
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.
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...
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()
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 .
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.
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?
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.
I've scenario where I want to insert data into database without post back. there are around 12 to 13 fields which i need to insert. I'm passing DTO from the client side which is actually Json object. Now the problem which i'm facing is how to convert that Json object which i got in webservice to the "class" (in my case class name is User) object.
[Code]....
In the above case AddNewUser method takes the object of User class. But i'm getting casting error. So how do I convert Json object to the "User" class object?