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...
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?
can you please help me to brainstorm the possible causes of this error. I've got a paged repeater with localisation bound programitcally to an sqldatasource using a stored proc. I can post code if needs be but it's rather long. I'm looking for typical causes of this error + will make note for future reference!
erver Error in '/WebSite4' Application.
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
Line 233:Line 234: Repeater1.DataSource = PagedResultsLine 235: Repeater1.DataBind()Line 236: doPaging()Line 237: End Sub
I have a nested gridview
i get error:Object reference not set to an instance of an object
when i try to get the text in the footer template of the inner gridview when clicking on the linkbutton!!!
[code]....
I am using C# and VS 2008 attached with access database, where Date1 is the PKey in Text defined.
I am getting the above error when i am trying to insert it into the access database.
here is my code
aspx :
[Code]....
Code Behind :
[Code]....
My problem is I get an "Object reference not set to an instance of an object." error at runtime on the line "ddl2.SelectedValue = cat1". Ironically I got this from an example on the internet and the only difference is my Cat1 varible which has the correct value at runtime.
<asp:FormView
id="frmCustomer"
DataSourceID="srcCustomer"[code]....
I tried to get the heade row text with the following code, but it failed.
[Code]....
Error returned was "Object reference not set to an instance of an object." on this line:
[Code]....
The stored proc fired to populate my grid view gets a column CasNo.The GridView has a DataBound item for CaseNo.
[Code]....
Then Why does this get null value: string caseNo = dataRow["CaseNo"] as string;
[Code]....
[Code]....
why I get this error:
Object reference not set to an instance of an object.
when I try to access a LinkButton inside a Repeater as follows:
[Code]....
[Code]....
I need to change the row.forecolor = drawing.color.red.
in my gridview i have a STATUS field, its ItemTemplate is LABEL1 and its EditTemplate is DropDownList1.
on loading I have successfully changed the forecolor, but when I edit it gave me an error:
Object reference not set to an instance of an object.
I get the error:
Object reference not set to an instance of an object
Im facing a very complicated problem when i tried to view in browser. It shows the above error and i notice it highlights the line code below :
Line 733: Dim CurrentPoint As Double = CType(txt_point.Text, Double)
Stack Trace:
[Code]....
[Code]....
I'm getting this error with this code:
Protected Sub Repeater1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles Repeater1.ItemDataBound
' display placeholder image if no imageId
Dim ltrImage1 As Literal = CType(e.Item.FindControl("Image1"), Literal)
Dim ltrImage2 As Literal = CType(e.Item.FindControl("Image2"), Literal)
Dim drv As DataRowView = CType(e.Item.DataItem, DataRowView)
If String.IsNullOrEmpty(drv("ImageId").ToString) Then
ltrImage1.Text = "<img src=""images/properties/x_thumb.gif"" alt="""" />"
ltrImage2.Visible = False
End If
End Sub
I want to set the image if no rows are returned.
[Code]....
I am getting error of in Foreach loop
[Code]....
How to resolve this situation or any other alternative to cum out of this problem.
i am trying to post the results of my query to a label that is on a DataList however i keep getting this error? it doesnt like
"lbl.Text = cmd.ExecuteScalar().ToString();"
[Code]....
I have created an ASP page to display records for auditor review and response. The page consists of two repeaters that display 5 rows from a database at a time. for each row displayed, a RadioButtonList, containing two buttons is attached. If the second button is selected, an input text box is displayed to allow auditor comments.
My situation is that I cannot find a way to identify which row is being selected? When I select the Button that should enable the text box, I'm receiving the following error:
"Object reference not set to an instance of an object"
I'm just starting out in ASP coding and would like to know what I'm not doing right?
[code]...
I got this error.
This application for delete multiple record in gridview using Check Box.
. I tried before one application, that one finally worked,
That application also error occurred, but after some time it execute(automatic I didnt do anything) correctly,
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error: [Code]....
Source File: c:InetpubwwwrootAdditionUpdateDefault.aspx.cs Line:155
I keep getting this error Object reference not set to an instance of an object. What i want to do is when the button is clicked my panel is visible with a textbox of the id number, of the row that they clicked. by id number i mean the column id, and the number given to it by the database.
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs)
Dim button As Button = CType(e.Row.FindControl("button1"), Button)
Dim id As Label = CType(e.Row.FindControl("id"), Label)
button.OnClientClick = _
Panel1.Visible = True
Label2.Visible = True
Label2.Text = id.Text
UpdatePanel1.Update()
End Sub
I have a gridview that shows a list of questions. Only one field is editable and if the information has been edited an email is sent to a specific "destiny". All works fine but when I try to get the Question ID in my SendEmail function (using Findcontrol) I get "Object reference not set to an instance of an object." How Can I get the Question ID?
My sqldatasource:
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:conn %>" SelectCommand="SELECT Questions.QuestionID, Questions.Name, Questions.Question, Questions.Destiny, Questions.DateQuestion, Questions.Answer" UpdateCommand="UPDATE Questions SET Destiny = @Destiny WHERE (QuestionID = @QuestionID)">
<SelectParameters>
</SelectParameters>
<UpdateParameters>.....
Traditionally with an Object Data Source, the wired up class will have its public properties available for binding (i.e. Gridview columns, etc.) which works well. But what if one of my wired up business objects has a property that is an object itself; can I drill down to a property on that object property and still use it?
So in additiona to the traditional:MyBusniessObject.OrderID...I want to use:MyBusniessObject.Customer.NameID
Your 1st response might be to just wire up the 'Customer' class, but I need properties both on 'MyBusinessObject'and 'Customer'. I do not think this can be done, as the ODS will not display properties on an object instance property. I have tried manually typing in the drilled down value as well, but that wasn't a success either.