I need to access the button in the footer template of my gridview. But I get an error : Object reference not set to an instance of an object.
Here's my gridview
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I have one grid which have 5 columns 1 for subject,2,3,4 for marks which have textbox to insert obtained marks,and last column have one lable to display total of (2+3+4),now i want total value on textbox event,when user enter any value to any column of textbox i need to display total of all three columns in total column. that things i did using javascript now i have one grand total text box in footer template according to sum of total i need to display grand total.so how can i get that footer template textbox in rowtype of DataControlRowType.DataRow.JAVASCRIPT :
<script language="javascript" type="text/javascript">
function sum(m1, m2, m3, txtTotal,txtFTotal) {
var mark1 = document.getElementById(m1).value;
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I have used the above grid view in my application ... Its working good, no problem.
Upon clicking the Addnewrowbutton, it uses to create a new row dynamically.
What i need is, new row should also be created dynamically, upon pressing enter key in the last textbox on a particular gird view row. User always can't go and click addnewrowbutton every time to create new row. Instead of it, user can press enter in the last textbox on a particular grid view row to create new row.
I want to make a button in footer template invisible from code behind, but i am unable to do that.
I tried
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How to access database values in footer template of repeater control in ASP.Net,C#. My Code is given below:
<asp:Repeater ID="rptrMaintenance" runat="server" OnItemDataBound="rptrMaintenance_DataBinding" >
<HeaderTemplate>
<table width="100%" cellpadding="0" cellspacing="0" valign="top">
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I have a repeater control and in its footer temlate is a button (or 2 in the example) and I want to catch its click event but seem to not be able to.
I tried in the repeater itemcommand event and also I tried defining a subprocedure for the 'occlick' event but neither works..
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I have placed a label in footer template of DataList Control.. And i want to access it a DataLists UpdateCommand..
if (e.Item.ItemType == ListItemType.Footer)
{
lbl = (Label)e.Item.FindControl("lblmessage");
}
But it did not work....
I am using Footer template in gridview for first time..
I am unable to show anything in the footer template with eval() method...
Here is some of my code in the gridview..
<asp:CommandField ShowSelectButton="True" FooterText="Amount" />
<asp:TemplateField HeaderText="ColorCode">
<ItemTemplate>
<asp:Label ID="lblColorCode" runat="server"><%# Eval("ColorCode")%> </asp:Label>
</ItemTemplate>
<FooterTemplate>
<%# Eval("Total")%>
</FooterTemplate>
</asp:TemplateField>
I have created a gridview dynamically from scratch and added it to my aspx page. This works fine, but i have a button in the footer of on of the columns, which when clicked on makes the gridview disappear and doesn't fire the onclick event that it should. This should obviously not be the case. My question is why does the event not fire and why does the gridview vanish? Bear in mind i have never created aa gridview in the code behind before, so excuse me if i am being dense
Code creating columns
Dim gvTownships As New GridView
'COLUMNS
Dim tmpCategory As New TemplateField
tmpCategory.ItemTemplate = New cGridViewTemplate(DataControlRowType.DataRow, "Category")
tmpCategory.HeaderTemplate = New cGridViewTemplate(DataControlRowType.Header, "Category")
tmpCategory.FooterTemplate = New cGridViewTemplate(DataControlRowType.Footer, "Calculation")
'INFORMATION
gvTownships.AutoGenerateColumns = False
gvTownships.ID = cmbChoice.SelectedItem.Text
gvTownships.ShowFooter = True
gvTownships.CssClass = "mGrid"
gvTownships.RowStyle.Wrap = False
gvTownships.HeaderStyle.CssClass = "mgrid"
gvTownships.HeaderStyle.Wrap = True
gvTownships.FooterStyle.CssClass = "mGridtf"
gvTownships.AlternatingRowStyle.CssClass = "alt"
gvTownships.GridLines = GridLines.Both
'add columns
gvTownships.Columns.Add(tmpCategory)
gvTownships.DataSource = dstSuburbTowhShip
gvTownships.DataBind()
Code to add button to footer
Sub InstantiateIn(ByVal container As System.Web.UI.Control) _
Implements ITemplate.InstantiateIn
Case DataControlRowType.Footer
If columnName = "Calculation" Then
Dim btnCalculate As New Button
btnCalculate.Text = "Calculate"
btnCalculate.CssClass = "button"
'add handler
AddHandler btnCalculate.Click, AddressOf btnCalculate_Clicked
container.Controls.Add(btnCalculate)
End If
Case Else
' Insert code to handle unexpected values.
End Select
End Sub
Private Sub btnCalculate_Clicked(ByVal sender As Object, ByVal e As EventArgs)
Try
Dim btnCalculate As Button = CType(sender, Button)
Dim gvRow As GridViewRow = CType(btnCalculate.NamingContainer, GridViewRow)
btnCalculate.CommandArgument = "Calculate"
Catch ex As Exception
End Try
End Sub
End Class
I gave placed the the button in the gridview footer template as below:
i also have handled the row command event but when i click on the button event does not fire
I have a gridview defined inside a div. I have defined a footertemplate for it, but for some reason, its not being displayed. Here is my code:
<div style="overflow: auto; min-height:10px; max-height: 250px;">
<asp:GridView ID="gvIncidentDetail" runat="server" GridLines="Vertical" OnRowCreated="gvIncidentDetail_OnRowCreated" OnRowDataBound="gvIncidentDetail_RowDataBound" OnSelectedIndexChanged="gvIncidentDetail_SelectedIndexChanged" Width="100%">
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I'm not sure how to do this, but I did read a lot of post and searched for it.
Protected Function GetTotal(ByVal DonTotalQty As Decimal, ByVal DonValue As Decimal)
[URL] im using above tutioral i have changed little bit first in Header1 i have dropdownlist on selecting that it cause postback then it bind some value from database to Header2 itemtemplate and Header3 itemtemplate label. on clicking add new row then it create new row if user selct again then it bind the values in two label what i need here is i need foter total for both Headerr2 and Header3 itemtemplate on footer template label.
View 18 RepliesIn the Gridview RowDataBound event, I am trying to find the control LinkB_Addnew located in the footer of my Grdiview:
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But I get the error --> Object reference not set to an instance of an object so It is like not found to me...
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<asp:Button ID="Button1" runat="server" BackColor="Transparent" BorderColor="Transparent"
View 3 RepliesI have 3 buttons that change the Information being displayed in my Gridview (Previous, Today, Forward). Now management wants to SUM the Date's information by column, I have figured out how to do this by changing the BoundField to a TemplateField and then add a FooterTemplate with a SQL DataSource. When I Press either the Previous or Forward button the data does not change in my Sum'd Footer column.
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iam trying to insert new record through gridveiw footer template field and its should added in sql database
i don't want to use sqldatasource, i wants to do through code.
I having problem to show footer template at data grid when there is an empty data. I need to show the footer template in order to let user input new record.
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I need to get access to the page index of the gridview so I can correctly get some data from a coresponding array to set the cell's contol properties correctly. Below is what I've got so far. The ExcelObject is a class that houses both the data read in from an sutomer submitted excel file and a matching 2 dimensional array of characteristics that I use in this case to set the CssClass property. My problem is that when I enable paging for the gridview I don't get the proper datasource row index when the data is read by the databinder.eval; what I'm getting is the current row of the gridview being generated.
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I have a gridview where I am looking to do a custom command with a template button. I am trying to get the current row that is being selected, but I cannot seem to figure out what I am doing wrong. Here is the gridview source:
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Here is the code once you click the "Quick Update" button
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I am getting the error message of "Object reference not set to an instance of an object." when it tries to do this line:
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I am using a Gridview to Edit, Delete, and Insert (thru the footer). I am tryng to usr required field validationg a column called qty .When I insert a record through footer validating is working fine.(Add button in footer template)
But when I edit a record and it is validating both footertemplate and edititemtemplate.
<asp:GridView ID="grdMatReq" runat="server" AutoGenerateColumns="False"
ShowFooter="True" Font-Size="Small"
AllowPaging ="True" onrowediting="EditMatReq"
OnPageIndexChanging = "OnPaging" CssClass="width-1050 center-margin center-text"
onrowupdating="UpdateMatReq" onrowcancelingedit="CancelEdit"
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I have a asp:button in template field of gridview, I set command name for this and in grid I mention on command event. On clicking the page it shows error message is :
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Below is my code
<asp:GridView runat="server" ID="gridManageClients" AutoGenerateColumns="False" OnRowCommand="gridRowCommand">
<Columns>
<asp:BoundField DataField="Clientid" ItemStyle-Width="75px" />
<asp:BoundField DataField="ClientName" ItemStyle-Width="300px" /> [code]...
im trying to handle the event for my grids itemtemplate button but its not firing.
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i want to find a row of my button click and there i can call my method.
I make multilanguage website. and i have convert procedure for this. How i get in templatefield button text ???
With GridView1
For Each c In .Columns
If TypeOf (c) Is EditCommandColumn Or TypeOf (c) Is CommandField Then
c.canceltext = convert(c.canceltext, Kullanici_val.language)
c.edittext = convert(c.edittext, Kullanici_val.language)
c.updatetext = convert(c.updatetext, Kullanici_val.language)
c.selecttext = convert(c.selecttext, Kullanici_val.language)
c.deletetext = convert(c.deletetext, Kullanici_val.language)
ElseIf TypeOf (c) Is TemplateField Then
c.text = convert(c.text, Kullanici_val.language)
Else
c.headertext = convert(c.headertext, Kullanici_val.language)
End If
Next
End With............................................
I get an error when attempting to navigate to the page containing this gridview. The error is
'SelectPackage_Click' is not a member of 'ASP.offer_aspx'.
here my page directive:
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Here is my markup. Eventhough SelectPackage_Click is present in the code behind, it is not wired up with the button control.
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