I have problem this gridview when I click on image button in gridview for delete row. I have this code
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField DataField="Username" HeaderText="Login Name">
<ItemStyle Width="150px" />
</asp:BoundField>
<asp:BoundField DataField="Question" HeaderText="Question">
<ItemStyle Width="200px" />
</asp:BoundField>
<asp:BoundField DataField="Answer" HeaderText="Answer">
<ItemStyle Width="150px" />
</asp:BoundField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:ImageButton ID="ImageButton1" runat="server" CausesValidation="False" AutoPostback = "True"
CommandName="Select" ImageUrl="~/images/trash.png" Text="Select" OnClientClick="return confirm('Do you want to delete?');" />
</ItemTemplate>
</asp:TemplateField>
when i click trash image for delete any row it gives me error. Invalid postback or callback argument.
This is my vb.net code
Private Sub updatedata(ByVal sql As String)
connectdb()
cmd = New SqlCommand
cmd.Connection = conn
cmd.CommandType = CommandType.Text
cmd.CommandText = sql
cmd.ExecuteNonQuery()
conn.Close()
End Sub
Protected Sub GridView1_SelectedIndexChanged(sender As Object, e As System.EventArgs) Handles GridView1.SelectedIndexChanged
Dim sql4 As String = "delete from login WHERE username='" & GridView1.SelectedRow.Cells(0).Text.Trim() & "' "
updatedata(sql4)
Related
I have a problem where I don't know how to combine between Facebox and OnselectedIndex function in asp.net.
Here is my code.
<asp:GridView runat="server" ID="GridView1" AutoGenerateColumns="False" class="table table-bordered data-table" OnSelectedIndexChanged = "OnSelectedIndexChanged" >
<columns>
<asp:TemplateField HeaderText="No." ItemStyle-HorizontalAlign="center">
<ItemTemplate>
<%# Container.DataItemIndex + 1%>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="Request ID" DataField="reqID"><ItemStyle HorizontalAlign="Center" /></asp:BoundField>
<asp:BoundField HeaderText="Username" DataField="reqName" />
<asp:BoundField HeaderText="Department" DataField="reqDept" />
<asp:BoundField HeaderText="Categories" DataField="reqCategories" />
<asp:BoundField HeaderText="Type" DataField="reqType" />
<asp:BoundField HeaderText="Description" DataField="reqDesc" />
<asp:ButtonField Text="Select" CommandName="Select" ItemStyle-Width="150" />
<asp:TemplateField HeaderText="Action" itemstyle-horizontalalign="Center"><ItemTemplate><a runat="server" href="#info" rel="facebox" >More</a></ItemTemplate></asp:TemplateField>
</columns></asp:GridView>
Here is my facebox code :
<div id="info" style="display:none;">
<asp:GridView runat="server" ID="GridView2" AutoGenerateColumns="False" class="table table-bordered data-table">
<columns>
<asp:TemplateField HeaderText="No." ItemStyle-HorizontalAlign="center">
<ItemTemplate>
<%# Container.DataItemIndex + 1%>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="Request ID" DataField="reqID" />
<asp:BoundField HeaderText="Verified By" DataField="verifiedBy" />
<asp:BoundField HeaderText="Verified Date" DataField="verifiedDate" />
<asp:BoundField HeaderText="Approved By" DataField="approvedBy" />
<asp:BoundField HeaderText="Approved Date" DataField="approvedDate" />
<asp:BoundField HeaderText="Accepted By" DataField="acceptedBy" />
<asp:BoundField HeaderText="Accepted Date" DataField="acceptedDate" />
<asp:BoundField HeaderText="Done By" DataField="doneBy" />
<asp:BoundField HeaderText="Done Date" DataField="doneDate" />
</columns></asp:GridView>
and here is my OnSelectedIndexChanged code :
Protected Sub OnSelectedIndexChanged(sender As Object, e As EventArgs)
Dim id As String
id = GridView1.SelectedRow.Cells(1).Text
conn.Open()
sqlstring = "SELECT * FROM ticketList where reqID = '" & id & "'"
cmd = New SqlCommand(sqlstring, conn)
dr = cmd.ExecuteReader
If dr.HasRows Then
dr.Close()
GridView2.DataSource = cmd.ExecuteReader
GridView2.DataBind()
End If
cmd.Dispose()
dr.Close()
conn.Close()
End Sub
Any idea when I click "More" then it will go to OnSelectedIndexChanged function and show data in my facebox?.
You need to add Handles GridView1.SelectedIndexChanged to the code:
Protected Sub OnSelectedIndexChanged(sender As Object, e As EventArgs) Handles GridView1.SelectedIndexChanged
Dim id As String
id = GridView1.SelectedRow.Cells(1).Text
conn.Open()
sqlstring = "SELECT * FROM ticketList where reqID = '" & id & "'"
cmd = New SqlCommand(sqlstring, conn)
dr = cmd.ExecuteReader
If dr.HasRows Then
dr.Close()
GridView2.DataSource = cmd.ExecuteReader
GridView2.DataBind()
End If
cmd.Dispose()
dr.Close()
conn.Close()
End Sub
Aim: Gridview with checkbox on each line, user then clicks a button and all ticked lines are actioned in the button code. I need the ID's of all the records where the CheckBox is checked.
Error:
Object reference not set to an instance of an object.
on row: ID_Current = row.FindControl("ID").ToString
if I change the to ID_Current = DirectCast(row.FindControl("cbSelect"), CheckBox).Checked I get 'True' as a result but I already know that and want to get the ID.
Aspx-Code with my Gridview:
<asp:Panel ID="ActionGrid" runat="Server">
<h2>Actions To Edit</h2>
<asp:GridView ID="GridView3" runat="server" AllowPaging="True" AllowSorting="True" AlternatingRowStyle-CssClass="alt" AutoGenerateColumns="False" CssClass="mGrid" DataKeyNames="UPRN" DataSourceID="SqlDataSource3" EmptyDataText="There are no data records to display." Font-Size="Medium" PagerStyle-CssClass="pgr" Width="1000px">
<%-- AutoGenerateEditButton="True"--%>
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:CheckBox ID="cbSelect" runat="server" AutoPostBack="false" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField ControlStyle-Width="50px" DataField="UPRN" HeaderText="UPRN" ReadOnly="True" SortExpression="UPRN" />
<asp:BoundField DataField="LocationItemPosition" HeaderText="Location Item Position" ReadOnly="True" SortExpression="LocationItemPosition" />
<asp:TemplateField HeaderText="Surveye" SortExpression="SurveyDate">
<ItemTemplate>
<asp:Label ID="lblSurveyDate" runat="server" Text='<%# apFunctionCharacters.fncDateTidy(Eval("SurveyDate"))%>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ItemRef" HeaderText="Item Ref" ReadOnly="True" SortExpression="ItemRef" />
<asp:BoundField DataField="OverallRiskCategory" HeaderText="Overall Risk Category" ReadOnly="True" SortExpression="OverallRiskCategory" />
<asp:BoundField DataField="Comments" HeaderText="Comments" ReadOnly="True" SortExpression="Comments" />
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
</asp:GridView>
<asp:Button ID="btnChangeToNA" runat="server" CssClass="Button" Text="Change to NA" />
<asp:Label ID="lblTest" runat="server" Text="Label"></asp:Label>
</asp:Panel>
Submit button:
<asp:Button ID="btnChangeToNA" runat="server" CssClass="Button" Text="Change to NA" />
.aspx.vb stored procedure/action code
Protected Sub btnChangeToNA_Click(sender As Object, e As EventArgs) Handles btnChangeToNA.Click
For Each row As GridViewRow In GridView3.Rows
Dim ID_Current As String = ""
'read the label
If DirectCast(row.FindControl("cbSelect"), CheckBox).Checked Then
ID_Current = row.FindControl("ID").ToString
' change value
'############stored procedure here
Dim connection As SqlConnection
Dim command As New SqlCommand
Dim ds As New DataSet
Dim ConnectionString1 As String = System.Configuration.ConfigurationManager.ConnectionStrings("MY_SQL").ToString()
connection = New SqlConnection(ConnectionString1)
connection.Open()
With command
.Connection = connection
.CommandText = "spChangeValue "
.CommandType = CommandType.StoredProcedure
.Parameters.Clear()
.Parameters.AddWithValue("#ID_Current", ID_Current)
.ExecuteNonQuery()
End With
'#############################
lblTest.Text += ID_Current
End If
'Loop
Next
End Sub
With FindControl you find controls(what suprise) not strings. And you have to pass the ID of the control not a property like Id.
So this doesnt make much sense:
Dim ID_Current As String = row.FindControl("ID").ToString()
Instead you could store the ID in a HiddenField, so on aspx:
<asp:HiddenField ID="HiddenID" runat="server" Value='<%# Eval("ID_Current") %>' />
Now you can get the reference to this HiddenField with FindControl:
Dim hiddenID As HiddenField = DirectCast(row.FindControl("HiddenID"), HiddenField)
Dim ID_Current As String = hiddenID.Value
You need a control with the id "ID"
<ItemTemplate>
<asp:HiddenField ID="ID" runat="server" Value='<%# FillMeSomehow%>' />
<asp:CheckBox ID="cbSelect" runat="server" AutoPostBack="false" />
</ItemTemplate>
I have checked all available articles and none seem to help me.
I have a GridView that is located inside a Repeater control. The data that populates the Gridview is dynamic and is grouped by a SectionID. I need for each repeated GridView to list the data rows grouped according to their SectionID.
How do I do this?
Thanks.
Here is what I have so far:
Public Sub GrabRepeaterData()
Dim connstr As String = ConfigurationManager.ConnectionStrings("MyString").ToString()
Dim ss As New SqlConnection(connstr)
Dim sqlStr As String = "SELECT SectionID, Name FROM Table1"
Dim selectCMD As New SqlClient.SqlCommand(sqlStr, ss)
Dim dt As New DataTable
Dim ds As New DataSet
Dim dataAdapter As SqlClient.SqlDataAdapter = New SqlClient.SqlDataAdapter
dataAdapter.SelectCommand = selectCMD
dataAdapter.Fill(dt)
selectCMD.Dispose()
dataAdapter.Dispose()
ss.Close()
ss.Dispose()
dt.Columns.Add("Column1")
dt.Columns.Add("Column2")
dt.Columns.Add("Column3")
dt.Columns.Add("Column4")
dt.Columns.Add("Column5")
dt.Columns.Add("Column6")
dt.Columns.Add("Column7")
dt.Columns.Add("Column8")
For Each row As DataRow In dt.Rows
Dim SectionID As String = ""
SectionID = row("SectionID")
Dim Column1 As String = ""
Dim Column2 As String = ""
Dim Column3 As Boolean
Dim Column4 As String = ""
Dim Column5 As String = ""
Dim Column6 As String = ""
Dim Column7 As Boolean
Dim Column8 As Boolean
Dim ProgConn As String = ""
ProgConn = ConfigurationManager.ConnectionStrings("MyString").ToString()
Dim ProgSqlQuery As New SqlConnection(ProgConn)
Dim ProgResults As New SqlCommand("SELECT [Column1], [Column2], [Column3], [Column4], [Column5], [Column6], [Column7], [Column8] FROM Table2 WHERE SectionID = #SectionID ORDER BY Column4 DESC", ProgSqlQuery)
ProgResults.Parameters.AddWithValue("#SectionID", SectionID).Value = SectionID
ProgSqlQuery.Open()
Dim rProg As SqlDataReader = ProgResults.ExecuteReader()
While rProg.Read()
If Not rProg("Column1").Equals(DBNull.Value) Then
Column1 = CStr(rProg("Column1"))
End If
If Not rProg("Column2").Equals(DBNull.Value) Then
Column2 = CStr(rProg("Column2"))
End If
If Not rProg("Column3").Equals(DBNull.Value) Then
Column3 = CStr(rProg("Column3"))
End If
If Not rProg("Column4").Equals(DBNull.Value) Then
Column4 = CStr(rProg("Column4"))
End If
If Not rProg("Column5").Equals(DBNull.Value) Then
Column5 = CStr(rProg("Column5"))
End If
If Not rProg("Column6").Equals(DBNull.Value) Then
Column6 = CStr(rProg("Column6"))
End If
If Not rProg("Column7").Equals(DBNull.Value) Then
Column7 = CStr(rProg("Column7"))
End If
If Not rProg("Column8").Equals(DBNull.Value) Then
Column8 = CStr(rProg("Column8"))
End If
End While
rProg.Close()
ProgResults.Dispose()
ProgSqlQuery.Close()
ProgSqlQuery.Dispose()
row("Column1") = Column1
row("Column2") = Column2
row("Column3") = Column3
row("Column4") = Column4
row("Column5") = Column5
row("Column6") = Column6
row("Column7") = Column7
row("Column8") = Column8
row.EndEdit()
dt.AcceptChanges()
Next
CustomInfoRepeater.DataSource = dt
CustomInfoRepeater.DataBind()
End Sub
Protected Sub CustomInfoRepeater_ItemDataBound(sender As Object, e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles CustomInfoRepeater.ItemDataBound
If e.Item.ItemType = ListItemType.Item Then
Try
Dim grdVw As GridView = TryCast(e.Item.FindControl("CustomInfoGridView"), GridView)
grdVw.DataSource = DirectCast(e.Item.DataItem, DataTable).Rows
grdVw.DataBind()
Dim CustPanel As UpdatePanel = DirectCast(CustomInfoRepeater.Items(0).FindControl("CustomInfoPanel"), UpdatePanel)
CustPanel.Update()
Catch
End Try
End If
End Sub
Here is my HTML:
<asp:Repeater ID="CustomInfoRepeater" runat="server">
<ItemTemplate>
<div class="download-box3">
</h2>
<asp:UpdatePanel ID="CustomInfoPanel" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:PostBackTrigger ControlID="CustomInfoGridView" />
</Triggers>
<ContentTemplate>
<asp:GridView ID="CustomInfoGridView" runat="server" Width="100%" AutoGenerateColumns="False"
DataKeyNames="Column1" GridLines="None" RowStyle-Height="40px" EnableViewState="False"
CellPadding="4" ForeColor="#333333" RowStyle-VerticalAlign="Middle">
<Columns>
<asp:BoundField DataField="Column1" />
<asp:TemplateField ItemStyle-Width="35px" ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle">
<ItemTemplate>
<asp:ImageButton ID="newIcon" runat="server" Width="31px" CssClass="myGridImage"
Visible="false" ImageUrl="images/new.png" />
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="35px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width="30px" ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle">
<ItemTemplate>
<asp:ImageButton ID="DeleteButton" runat="server" AlternateText="Delete" ImageUrl="images/xmark.png"
OnClientClick="return confirm('Are you sure you want to delete this entry?')"
CommandArgument='<%# Eval("Column1") %>' CommandName="Remove" CssClass="myGridImage">
</asp:ImageButton>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="30px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width="50px" ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle">
<ItemTemplate>
<asp:LinkButton ID="GenComUpdateButton" runat="server" CssClass="buttonsmall" Text="update"
CommandArgument='<%# Eval("Column1") %>' CommandName="GenComments"></asp:LinkButton>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Impact" HeaderStyle-HorizontalAlign="Center" ItemStyle-Width="30px"
ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle">
<ItemTemplate>
<asp:Image ID="statusIcon" runat="server" Width="20px" CssClass="myGridImage" Visible="false"
ImageUrl="" AlternateText="*" />
</ItemTemplate>
<HeaderStyle HorizontalAlign="Center"></HeaderStyle>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width="50px" HeaderText="Files" ItemStyle-HorizontalAlign="Center"
ItemStyle-VerticalAlign="Middle">
<ItemTemplate>
<asp:ImageButton ID="filesIcon" runat="server" Width="23px" CssClass="myGridImage"
CommandArgument='<%# Eval("Column3") %>' CommandName="Download" Visible="false"
ImageUrl="images/pdf.png" AlternateText="*" />
<asp:LinkButton ID="AttachAssetsBtn" runat="server" CssClass="buttonredsmall" Text="upload"
CommandArgument='<%# Eval("Column1") %>' CommandName="Uploads" Visible="false"></asp:LinkButton>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
</asp:TemplateField>
<asp:BoundField DataField="Column3" HeaderText="Summary" HeaderStyle-HorizontalAlign="Center"
ItemStyle-VerticalAlign="Middle">
<HeaderStyle HorizontalAlign="Center"></HeaderStyle>
<ItemStyle VerticalAlign="Middle" HorizontalAlign="Left" />
</asp:BoundField>
<asp:TemplateField ItemStyle-Width="50px" HeaderText="Reviewed" ItemStyle-HorizontalAlign="Center"
ItemStyle-VerticalAlign="Middle">
<ItemTemplate>
<asp:Image ID="reviewedIcon" runat="server" Width="23px" CssClass="myGridImage" Visible="false"
ImageUrl="images/checkmark.png" AlternateText="*" />
<asp:CheckBox ID="reviewedCheckBox" runat="server" CssClass="inputtext" Visible="false"
AutoPostBack="true" OnCheckedChanged="GenComCheckUpdate" />
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
</asp:TemplateField>
<asp:BoundField DataField="Column4" HeaderText="Updated" HeaderStyle-HorizontalAlign="Center"
ItemStyle-VerticalAlign="Middle" ItemStyle-Width="75px">
<ItemStyle VerticalAlign="Middle" HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="Column6" Visible="false" />
<asp:BoundField DataField="Column7" Visible="false" />
</Columns>
<EmptyDataTemplate>
<span class="data-none">No Comments have been added to this section.</span>
</EmptyDataTemplate>
<RowStyle CssClass="RowStyle" BackColor="#F7F6F3" ForeColor="#333333" />
<EmptyDataRowStyle CssClass="EmptyRowStyle" />
<PagerStyle CssClass="PagerStyle" BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle CssClass="SelectedRowStyle" BackColor="#E2DED6" Font-Bold="True"
ForeColor="#333333" />
<HeaderStyle CssClass="HeaderStyle" BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle CssClass="EditRowStyle" BackColor="#999999" />
<AlternatingRowStyle CssClass="AltRowStyle" BackColor="White" ForeColor="#284775" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</ItemTemplate>
<SeparatorTemplate>
<hr />
</SeparatorTemplate>
</asp:Repeater>
Thanks for your help!
What I understand from the code is you are merging two datasources into one. Then binding it to the Repeater and then fetching the datasource for GV from the repeater DataItem and binding it to the GridView.
What I would suggest is keep the datasources separate and do it in two steps:
1: Bind the repeater to just the SectionID i.e. data returned by SELECT SectionID, Name FROM Table1
2: In the Repeater ItemDataBound, get the SectionID and fetch data with the query you have in ProgResults. Then bind that to the GV.
I totally agree with gbs. Here's how you can do it:
In the markup, add a hidden field inside repeater, outside the updatepanel:
<asp:Repeater ID="CustomInfoRepeater" runat="server">
<ItemTemplate>
<asp:HiddenField ID="hdnSectionID" Value='<%# Eval("SectionID")%>' runat="server" />
<asp:Label ID="lblName" Text='<%# Eval("Name")%>' runat="server"></asp:Label>
<div class="download-box3">
</h2>
<asp:UpdatePanel ID="CustomInfoPanel" runat="server" UpdateMode="Conditional">
<%-- Rest of the markup goes here --%>
Rewrite GrabRepeaterData() sub only to populate the repeater:
Public Sub GrabRepeaterData()
Dim connstr As String = ConfigurationManager.ConnectionStrings("MyString").ToString()
Dim dt As New DataTable
Using conn As SqlConnection = New SqlConnection(connstr)
conn.Open()
Dim sqlStr As String = "SELECT SectionID, Name FROM Table1"
Dim cmd As New SqlClient.SqlCommand(sqlStr, conn)
Dim adapter As SqlClient.SqlDataAdapter = New SqlClient.SqlDataAdapter
adapter.SelectCommand = cmd
adapter.Fill(dt)
End Using
CustomInfoRepeater.DataSource = dt
CustomInfoRepeater.DataBind()
End Sub
In repeater's ItemDataBound, find the HiddenField, find it's value, find the GridView inside UpdatePanel, populate it this way:
Protected Sub CustomInfoRepeater_ItemDataBound(sender As Object, e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles CustomInfoRepeater.ItemDataBound
If e.Item.ItemType = ListItemType.Item Then
Dim sectionID As Integer = 0
Dim hdnSectionID = TryCast(e.Item.FindControl("hdnSectionID"), HiddenField)
Dim CustomInfoPanel = TryCast(e.Item.FindControl("CustomInfoPanel"), UpdatePanel)
If (CustomInfoPanel IsNot Nothing AndAlso hdnSectionID IsNot Nothing AndAlso Integer.TryParse(hdnSectionID.Value, sectionID)) Then
Dim CustomInfoGridView = TryCast(CustomInfoPanel.FindControl("CustomInfoGridView"), GridView)
If (CustomInfoGridView IsNot Nothing) Then
Dim connstr As String = ConfigurationManager.ConnectionStrings("MyString").ToString()
Dim dt As New DataTable
Using conn As SqlConnection = New SqlConnection(connstr)
conn.Open()
Dim cmd As New SqlCommand("SELECT [Column1], [Column2], [Column3], [Column4], [Column5], [Column6], [Column7], [Column8] FROM Table2 WHERE SectionID = #SectionID ORDER BY Column4 DESC", conn)
cmd.Parameters.AddWithValue("#SectionID", sectionID)
Dim adapter As SqlClient.SqlDataAdapter = New SqlClient.SqlDataAdapter
adapter.SelectCommand = cmd
adapter.Fill(dt)
End Using
CustomInfoGridView.DataSource = dt
CustomInfoGridView.DataBind()
End If
End If
End If
End Sub
I have this code and I can't get the value of student number based on what row is clicked by the user
ASPX
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"
OnSelectedIndexChanged="SelectEvent_click" HorizontalAlign="Center" DataKeyNames="StudentNumber">
<Columns>
<asp:BoundField DataField="StudentNumber" HeaderText="Student Number"/>
<asp:BoundField DataField="F_name" HeaderText="First name"/>
<asp:BoundField DataField="L_name" HeaderText="Last name"/>
<asp:BoundField DataField="Course" HeaderText="Course"/>
<asp:BoundField DataField="Date" HeaderText="Date" DataFormatString="{0:dd-MMM-yyyy}"/>
<asp:TemplateField HeaderText="View Application">
<ItemTemplate>
<asp:LinkButton ID="lnkApplication" runat="server" onClick = "SelectEvent_click"
Text="Select"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
VB
Protected Sub SelectEvent_click(sender As Object, e As EventArgs) Handles GridView1.SelectedIndexChanged
Label1.Text = GridView1.SelectedValue
If GridView1.SelectedIndex >= 0 Then
Response.Write(Label1.Text)
Session("StudentNumber") = Label1.Text
Response.Redirect("PCOApplicationView.aspx")
Else
Response.Write("Something bad happen please try again later!!")
End If
End Sub
You can use NamingContainer property on button click event, somthing like this :
Dim btn As LinkButton = DirectCast(sender, LinkButton)
GridViewRow = DirectCast(btn.NamingContainer, GridViewRow)
Hey all i am wondering if it was possible to evaluate the datafield each time it places a new record into a row?
my gridview code is this:
<asp:Panel ID="pnlGrid" runat="server">
<div class="left_main_container" style="margin-bottom:20px;">
<asp:GridView ID="grdView" runat="server" CssClass="GridViewStyle"
AutoGenerateColumns="False" GridLines="None" Width="100%">
<Columns>
<asp:BoundField DataField="id" Visible="False" />
<asp:BoundField DataField="theName" HeaderText="Name" />
<asp:BoundField DataField="status" HeaderText="Status" />
</Columns>
<RowStyle CssClass="RowStyle" />
<EmptyDataRowStyle CssClass="EmptyRowStyle" />
<PagerStyle CssClass="PagerStyle" />
<SelectedRowStyle CssClass="SelectedRowStyle" />
<HeaderStyle CssClass="HeaderStyle" />
<EditRowStyle CssClass="EditRowStyle" />
<AlternatingRowStyle CssClass="AltRowStyle" />
</asp:GridView>
</div>
</asp:Panel>
The field i need to evaluate is status. I need to find out if the status is yes or if its no. If its no then i need to make it a link for the user to be able to change it to a yes.
The gridview is populated by this code:
Dim objConn As MySqlConnection
Dim objCmd As MySqlCommand
objConn = New MySqlConnection(strConnString)
objConn.Open()
Dim strSQL As String
strSQL = "SELECT id, status, " & _
"CONCAT(' ', first_name, last_name) AS theName " & _
"FROM(builder_requests) " & _
"ORDER BY status, id DESC;"
Dim dtReader As MySqlDataReader
objCmd = New MySqlCommand(strSQL, objConn)
dtReader = objCmd.ExecuteReader()
grdView.DataSource = dtReader
grdView.DataBind()
dtReader.Close()
dtReader = Nothing
objConn.Close()
objConn = Nothing
Any help would be great!
I like to use a TemplateField and a function in your code-behind to do this sort of thing.
I am assuming your status field is a string field not boolean but if not let me know and I can adjust the example.
Replace your BoundField with...
Markup:
<asp:TemplateField>
<ItemTemplate>
<%# Eval("status")%>
<asp:LinkButton ID="cmdChangeStatus" runat="server" CommandName="ChangeStatusToYes" CommandArgument='<%# Eval("id") %>'
Visible='<%# SetChangeStatusVisibility(Eval("status")) %>'>Change to Yes</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
And add code behind function...
Code:
Protected Function SetChangeStatusVisibility(status As Object) As String
Dim strStatus As String = status.ToString()
If strStatus = "no" Then
Return "True"
Else
Return "False"
End If
End Function
Then you can handle the GridView.RowCommand event to change the status value based on the id value in CommandArgument :)