i have a div inside a gridview. Now I need to access the div from code behind to change its background color
for some specific data.
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I am trying to access the DIV from gridview row data bound without any success.
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I have the following error
"System.NullReferenceException: Object reference not set to an instance of an object."
I have gridview in my page that users can edit their data in gridview... and in this gridview I define label that I want when users click on Edit button it change label3.text:
below is code:
<asp:GridView ID="GridView1" runat="server" CssClass="DGridView1"
AutoGenerateColumns = "false" Font-Names = "Tahoma"
Font-Size = "9pt"
HeaderStyle-BackColor = "#e0e0e0"
OnPageIndexChanging = "OnPaging" onrowediting="EditCustomer"
onrowupdating="UpdateCustomer" onrowcancelingedit="CancelEdit"
GridLines = "Both" OnRowDataBound = "OnRowDataBound"
>
And .cs:
protected void EditCustomer(object sender, GridViewEditEventArgs e) {
Label Label3 = (Label)GridView1.Rows[e.NewEditIndex].FindControl("Label3");
Label3.Text = "neda";
GridView1.EditIndex = e.NewEditIndex;
BindData();
BindData1();
}
but here when I click on EditCustomer it doen't change label3.text
I have a dropdownlist outside the gridview control. My griview control also have dropdownlist in the first column. I want to populate the dropdownlist inside the gridview control for all rows when the selected item is changed in the outside dropdownlist.
View 2 RepliesI have a GridView inside a repeater, and for all the GridView events such as ItemDataBound, etc. I can't just use the same because it doesn't recognize it. I know I have to use FindControl and type in the ID, but how?
View 6 RepliesI have the gridview inside another gridview, i want to sort that both gridviews, I don't know how to achieve using asp.net 3.5 visual studio 2008 c# code behind. Following are my aspx page,
<div
id="divclm"
runat="server">
<asp:GridView
ID="claimgrid"
runat="server"
AutoGenerateColumns="False" AllowSorting="True"
Width="100%"
AllowPaging="True"
CssClass="gareahead"
EmptyDataText="No Records To Display"
OnRowDataBound="claimgrid_RowDataBound"
OnRowCreated="claimgrid_RowCreated"
GridLines="Both"
OnPageIndexChanging="claimgrid_PageIndexChanging"
OnSorting="claimgrid_Sorting"
CaptionAlign="Right">
<Columns>
<asp:HyperLinkField
Text="<img id='upimg' src='Styles/Images/appschg.gif'/>"
ItemStyle-Width="10px">
<ItemStyle
Width="10px"
/>
</asp:HyperLinkField>
<asp:BoundField
DataField="name"
HeaderText="Name"
SortExpression="name">
<HeaderStyle
HorizontalAlign="Center"
/>
<ItemStyle
HorizontalAlign="Left"
/>
</asp:BoundField>
<asp:BoundField
DataField="code"
HeaderText="Code"
SortExpression="code">
<HeaderStyle
HorizontalAlign="Center"
/>
<ItemStyle
HorizontalAlign="Left"
/>
</asp:BoundField>
<asp:TemplateField>
<ItemTemplate>
</td></tr>
<tr>
<td
colspan="6"><div
id="<%#Eval("code") %>"
style="display:none;position:relative">
<asp:GridView
ID="Gdclmline1"
runat="server"
AllowPaging="True"
AllowSorting="True"
AutoGenerateColumns="False"
OnSorting="Gdclmline1_Sorting" BorderColor="Green"
BorderStyle="Solid"
BorderWidth="1px"
OnRowDataBound="Gdclmline1_RowDataBound"
OnRowEditing="Gdclmline1_RowEditing" Font-Names="Verdana"
Font-Size="8pt"
Font-Strikeout="False"
OnSelectedIndexChanging="Gdclmline1_SelectedIndexChanging"
OnRowUpdating="Gdclmline1_RowUpdating" PageSize="1000"
RowStyle-Wrap="false"
Width="100%"
CssClass="gareahead"
EmptyDataText="No Records To Display"
GridLines="Both">
<PagerSettings
Mode="NextPreviousFirstLast"
NextPageText="Next"
Position="Top"
PreviousPageText="Prev"
/>
<Columns>
<asp:TemplateField
HeaderText="phone"
SortExpression="phone">
<HeaderStyle
HorizontalAlign="Center"
/>
<ItemStyle
HorizontalAlign="Left"
/>
<ItemTemplate>
<asp:Label
ID="lblphone"
runat="server"
Text='<%#Bind("phone") %>'> </asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField
HeaderText="address1"
SortExpression="address2">
<HeaderStyle
HorizontalAlign="Center"
/>
<ItemStyle
HorizontalAlign="Left"
/>
<ItemTemplate>
<asp:Label
ID="lbladdress1
runat="server"
Text='<%#Bind("address1") %>'> </asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle
CssClass="gr"
Height="100px"
HorizontalAlign="Left"
Wrap="true"/>
<SelectedRowStyle
CssClass="gr"
/> <PagerStyle
CssClass="gareahead"
HorizontalAlign="Left"
Wrap="False"
/> <HeaderStyle
CssClass="ghead"
ForeColor="White"
Wrap="true"
/> </asp:GridView>
</div>
</td>
</tr>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<PagerSettings
Mode="NextPreviousFirstLast"
NextPageText="Next"
Position="Top"
PreviousPageText="Prev"
/>
<HeaderStyle
HorizontalAlign="Center"
VerticalAlign="Middle"
CssClass="ghead"
ForeColor="White"
/>
<RowStyle
CssClass="gr"
/>
<SelectedRowStyle
CssClass="gs"
/>
</asp:GridView>
</div>
that aspx page contains gridview that contain one more gridview inside in it.Now i want to sort out both the grid i.e)claimgrid and Gdclmline1 i want code in c#.
I a using Visual Basic, take this into consideration.
I do have the following GriedView:
<asp:GridView
ID="StandardClassifiedsDisplayGridView"
runat="server"
DataSourceID="srcClassifieds"
AutoGenerateColumns="False"
CellPadding="4"
ForeColor="#333333"
AllowPaging="True"
PageSize="100"
DataKeyNames="AutoNumber,UDTIItemDescentFrom">
<Columns>
<asp:TemplateField HeaderText="Picture">
<ItemTemplate>
<asp:ImageButton
ID="ThumbNailImageButton"
runat="server"
Width="75px"
PostBackUrl='<%# string.Concat("~/Classifieds/DetailPage.aspx?AutoNumber=",Convert.ToString(Eval("AutoNumber")),"&FlagForm=NoSubmitted") %>'
ImageUrl='<%# IIF(System.IO.File.Exists(Server.MapPath(string.Format("~/UploadedImagesClassifieds/{0}{1}", Eval("AutoNumber"), "Pic1.jpg"))), string.Format("~/UploadedImagesClassifieds/{0}{1}", Eval("AutoNumber"), "Pic1.jpg"), "~/UploadedImagesClassifieds/NoPicture.gif")
%>'
/>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:BoundField DataField="Category" HeaderText="Category" />
<asp:HyperLinkField HeaderText="Listing Title" DataNavigateUrlFormatString="~/Classifieds/DetailPage.aspx?AutoNumber={0}&FlagForm=NoSubmitted" DataNavigateUrlFields="AutoNumber" DataTextField="ItemTitle"/>
<custom:LongTextField DataField="ListingComment" Width="400px" Height="75px" HeaderText="Listing Comment" HtmlEncode="false" />
<asp:BoundField DataField="EnterDate" HeaderText="Listed on" />
<asp:HyperLinkField HeaderText="See trade history" DataNavigateUrlFormatString='<%# IIF( Eval("UDTIItemDescentFrom").ToString <> "Parent", string.Format("~/Classifieds/SearchPageWithForm.aspx?AutoNumber=", Eval("UDTIItemDescentFrom"),
"&KindOfSearch=ShowMyUDTIGameDownlines"), string.Format("~/Classifieds/SearchPageWithForm.aspx?AutoNumber=", Eval("AutoNumber"), "&KindOfSearch=ShowMyUDTIGameDownlines") ) %>' Text="See trade history"/>
</Columns>
The code inside the PostBackUrl=' and ImageUrl=' are working fine. I tried to do the same, with the code inside the DataNavigateUrlFormatString=' but it is giving me a hard time. It is not working.
In datalist, I hve populated Grdiview according the Category Id. Inside Gridview , I hve checkboxes. Now i want to get the selected checkboxes names to be insrted into the database. how to get access of those checkboxes inside of Gridview.
View 9 RepliesBasically as the title of this thread states, I have a FormView that has a GridView inside it and my ObjectDataSource that populates this grid cannot access the Grid.
The Control Id needs to be the name of the Grid I want to access, however through the 'wizard' the Control parameter drop down cannot 'see' the grid I need, only the FormView that is in.
I have tried numerous ways to get round this and am struggling now..
I've tried the following...
ControlID="FormView.GridView1"
ControlID="FormView.FindControl("GridView1")
ControlID="<%= GetNameOfGrid %>"
and numerous other attempts that also failed that I now cant remember...
this is in my aspx page:
<asp:HyperLink ID="lnkAll" runat="server" CssClass="links_b"></asp:HyperLink>
<asp:GridView ID="gridfeatured" runat="server" AllowSorting="false" AllowPaging="false" AutoGenerateColumns="false"
ShowHeader="false" GridLines="None" CssClass="grid" CellSpacing="5">
<Columns>
<asp:TemplateField itemStyle-CssClass="gridrc">
<ItemTemplate>
<table>
<tr>
<td>
<asp:HyperLink ID="lnkLogo" runat="server" >
.
.
.
.
now, in code behind it is'nt allowing me to use lnklogo.navigateurl("...") property.
whereas it is allowing me to use lnkall.navigateurl("...").
i think this is because the lnklogo is inside gridviews tempalte field. what is the solution to this.
i cannot provide navigateurl in aspx page and have to provide it in code behind since i want to do a conditional loop on it.
I need to generate a GridView and inside of one of the cells insert a DropDownList.
The GridView is a list of the users of the web application.The DropDownList is a list of roles of the web aplication.
The GridView is to be a table with the diferent users, diferent columns with various information, the last cell should have a DropDownList with the roles, the role which the user of the line belongs to, should be visible!
I have a dropdownlist in a headertemplate but I can't seem to access it in the code behind to work with the onselectedindexchanged event. I want to change the data that is shown on the event but can't access the control.
View 2 RepliesI am trying to get access the elements inside gridview by validating this requirement: if checkbox is checked then 1) Role must be selected from the dropdown 2) And the Title textbook must be filled. I am getting this error now:
Error: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.
JS
<script type="text/javascript">
function validate() {
var flag = true;
var gridView = document.getElementById('<%= gvTest.ClientID %>');
for (var i = 1; i < gridView.rows.length; i++) {
[Code] ......
I have create one user control of personal details, and write the geting data from database method and Load the entities in respective field,then how to bind user control in gridview and how to accecc Id of user control in aspx page.
View 1 RepliesI have a checkbox and a panel inside of a FormView control, and I need to access them from the code behind in order to use the checkbox to determine whether or not the panel is visible. This is the code that I originally used, but since I put the controls inside of the FormView, it no longer works.
Protected Sub checkGenEd_CheckedChanged(ByVal sender As Object, _
ByVal e As System.EventArgs)
If checkGenEd.Checked = True Then
panelOutcome.Visible = True
Else
panelOutcome.Visible = False
End If
End Sub
I've started to figure this out based on other questions I looked up on here, but all of them were in C# instead of VB, so this is as far as I got:
Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
End If
End Sub
So yeah I'm not sure exactly how to finish it. here's my code now:
Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
CheckBox checkGenEd = formview1.FindControl("checkGenEd");
Panel panelOutcome = formview1.FindControl("panelOutcome");
End If
End Sub
It's also saying that checkGenEd and panelOutcome are not declared. I changed my code to this but it still doesn't work:
Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
Dim checkGenEd As CheckBox = FormView1.FindControl("checkGenEd")
Dim panelOutcome As Panel = FormView1.FindControl("panelOutcome")
If checkGenEd.Checked = True Then
panelOutcome.Visible = True
Else
panelOutcome.Visible = False
End If
End If
End Sub
There aren't any errors anymore, but nothing happens when I click the checkbox. I think there needs to be some kind of event to trigger it but I don't know how you can put an event handler inside of an event handler.
I am having textbox UserControl inside gridview. It generates id like
ContentPlaceHolder1_gvDetails_txtPcs_1_txtTextBox_1
I am not able to calculate running total it gives NaN
<asp:UpdatePanel ID="GridViewUpdtPanel" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:GridView ID="gvDetails" DataKeyNames="Entryid" runat="server" AutoGenerateColumns="false"
ShowFooter="true" OnRowCancelingEdit="gvDetails_RowCancelingEdit" OnRowDeleting="ColInfo_DeleteEntry"
OnRowEditing="gvDetails_RowEditing" OnRowUpdating="gvDetails_RowUpdating" OnRowDataBound="gvDetails_RowDataBound"
[Code] ....
How can i set the value of literal control inside itemtemplate control of gridview from code behind ?(i am using vb.net)
View 1 RepliesI need the ability to check a box and then store or remove the text of the checkbox clicked to my sql server database. see my code below that is written in vb.
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="SBN_Company_Cat_Types.aspx.vb" Inherits="ShopBuyName_Test_Site.SBN_Company_Cat_Types" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[Code].....
Can i put gridview inside gridview and bind data to that inside grid?
View 4 RepliesI have an UpdatePanel with a GridView. This GridView has a template column that is a DropDownList. The problem is that the SelectedIndexChanged event does not fire for the DropDownList. Here is the code:
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The codebehind:
[Code]....
How do I access a specific control within a FormView's "<InsertItemTemplate>"?
View 2 RepliesI am trying to access accessing a control in a Formview. I have tried several methods, but nothing seems to work
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see the following code. How do I access the imageButton (or any other control I may happen to have) within the listView? In this case, I'd like to change the image of the imagebutton based on certain conditions in the code behind file while the listview is being populated.
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I try to make button inside datalist to be invisble based on a column value from database. I am able to read the column data but i cant find solution to make the button invisible. Below is my code behind:-
[Code]....
I've googled around for a couple of days now and tried different solutions posted here and there, but nothing has worked so far. Therefore I'm forced to write a new thread about this subject.
I'm working on a solution containing nested listviews. The top listview lists different projects, and in each project a nested listview lists images from that specific project using a nested sqldatasource. Inside the nested listview I want the user to be able to add new images, and i'm using the InsertItemTemplate of the nested listview. When inserting a new image, the project need to be specified, as the project is a foreign key in my image database. The problem is that in my InsertItemTemplate, "Bind" and "Eval" does not work (I believe this is by design). Therefore, when adding the new image I don't have access to the project. I'm using the ItemInserting event of the nested listview to upload the image, and the optimal solution would be to have access to the project in this event and just pass it on as a parameter.
I have a RadioButtonList control inside of a nested ListView control InsertTemplate. I need a way to access this control in the nestedListView_ItemInserting method.
View 6 Replies