My GridView is as follows
It has EmptyDatatemplate and Command Field
<asp:GridView ID="AGridView" runat="server" AutoGenerateColumns="true" style="table-layout:fixed;" Width="2000px" RowStyle-HorizontalAlign="Left">
<EmptyDataTemplate>
</EmptyDataTemplate>
<asp:CommandField ShowEditButton="True" ItemStyle-Width="80px" EditText="Edit">
<ItemStyle Font-Bold="true" Font-Size="Small" />
<HeaderStyle CssClass="AAddOn" />
</asp:CommandField>
</asp:GridView>
GridView Looks like
Name Age Country
A 10 NNN Edit
B 23 NNN Edit
Now if i click on edit i need only Age Column to be edited
If i give AGridView.EditIndex = e.NewEditIndex entire row is edited
In codebehind
Private Sub AGridView_RowEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles AGridView.RowEditing
Try
AGridView.EditIndex = e.NewEditIndex
AGridView.DataSource = SessionItems.ADataset.Tables("AHello")
AGridView.DataBind()
Catch ex As Exception
SetErrorMsg(ex.Message.ToString, "Error")
End Try
End Sub
That's simple. Whatever the columns you don't want editable, just add those in DataKeyNames property of grid. Try this.
<asp:GridView ID="AGridView" runat="server" AutoGenerateColumns="true" style="table-layout:fixed;" Width="2000px" RowStyle-HorizontalAlign="Left" DataKeyNames = "Name,Country" >
<EmptyDataTemplate>
</EmptyDataTemplate>
<asp:CommandField ShowEditButton="True" ItemStyle-Width="80px" EditText="Edit">
<ItemStyle Font-Bold="true" Font-Size="Small" />
<HeaderStyle CssClass="AAddOn" />
</asp:CommandField>
</asp:GridView>
Private Sub AGridView_RowEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles AGridView.RowEditing
Try
Dim colsToNotEdit As List<string>
//C# code
for (int i = 0; i < AGridView.HeaderRow.Cells.Count; i++)
{
if(AGridView.HeaderRow.Cells[i].Text !="age")
colsToNotEdit.Add(grdToDisplay.HeaderRow.Cells[i].Text);
}
AGridView.DataKeyNames = colsToNotEdit.ToArray()
AGridView.EditIndex = e.NewEditIndex
AGridView.DataSource = SessionItems.ADataset.Tables("AHello")
AGridView.DataBind()
Catch ex As Exception
SetErrorMsg(ex.Message.ToString, "Error")
End Try
End Sub
Another option would be to not use the AutoGenerateColumns functionality and specify your column templates.
This way you can specify the ItemTemplate, EditTemplate or FooterTemplate for each column.
So for a column that you dont want to edit, ie. Name use <asp:BoundField> and for age use:
<asp:TemplateField>
<ItemTemplate><asp:Label>Bind Me</asp:Label></ItemTemplate>
<EditItemTemplate><asp:TextBox>Bind Me</asp:TextBox></EditItemTemplate>
</asp:TemplateField>
Edit: When using Dynamic Column Names
If you have a datatable that contains your data, lets say dtRowData.
You should have a piece of code where you assign the datatable to the grid:
GridView1.DataSource = dtRowData;
GridView1.DataBind();
You can add a loop in before the databind call as follows:
string DataKeyNames = "";
foreach (DataColumn dc in dtRowData.Columns)
{
if(dc.Name != "Age")
DataKeyNames += dc.Name + ",";
}
And then before Binding Set GridView1.DataKeyNames = DataKeyNames
You will probably need to do a substring on DataKeyNames to remove the trailing ,
Related
so I have a gridview which is displaying a db table I have.
I dont create the table manually obviously as this is what <%#Eval("text")%>' and Bind() do.
I created a unique table with my sql query to add two rows of sum in the bottom of the table, ( 2 last records), my question is:
is there a way in which I can access those rows to style them?
I think its not possible but still Im asking maybe Ill find out that theres a way.
thanks
Yes, the need to style a individual cell (auto generated columns, or bound columns), or even style the whole row.
Let's do all 3
First up, style a "cell" (these are in the cells collection, and autogenerated columns, and NON templated columns).
So, say this simple grid
<asp:GridView ID="GridView1" runat="server" Width="40%"
AutoGenerateColumns="False" DataKeyNames="ID" CssClass="table table-hover">
<Columns>
<asp:BoundField DataField="FirstName" HeaderText="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="HotelName" HeaderText="HotelName" />
<asp:BoundField DataField="City" HeaderText="City" />
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<asp:Label ID="lblDescript" runat="server"
Text='<%# Eval("Description") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Active" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:CheckBox ID="chkActive" runat="server"
Checked='<%# Eval("Active") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
(note how I included BOTH templated columns which have plain jane asp.net controls like label, textbox etc., or the built in GV columns (data bound ones, or auto generated)
Code to load the GV is this:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
LoadData()
End If
End Sub
Sub LoadData()
Dim strSQL = "SELECT * FROM tblHotelsA ORDER BY HotelName"
Using conn As New SqlConnection(My.Settings.TEST4)
Using cmdSQL As New SqlCommand(strSQL, conn)
conn.Open()
Dim rst As New DataTable
rst.Load(cmdSQL.ExecuteReader)
GridView1.DataSource = rst
GridView1.DataBind()
End Using
End Using
End Sub
And we now have this:
Ok, so let's do example 1 - lets color the "city" Colum in above. Note how "city" is a "bound field".
So, auto generated, or bound fields = cells collection.
So, for things like conditional formatting, even combine some columns, change color, hide show images, or whatever?
you use the GV row databound event. (and this applies well to listview, repeaters, etc.)
So, lets say for city = Edmonton, we want a light blue cell, and for city = "Edmonton", we want some light green.
So, we use the row bound event.
This code:
Protected Sub GridView1_RowDataBound(sender As Object, e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
Select Case e.Row.Cells(3).Text
Case "Edmonton"
e.Row.Cells(3).BackColor = System.Drawing.Color.SkyBlue
Case "Banff"
e.Row.Cells(3).BackColor = System.Drawing.Color.LightGreen
End Select
End If
End Sub
And we now have this:
However, the above for "templated" colums works a bit different.
Lets say we want to highligh the description when check box = true (checked).
In that case, we can't (don't) use the cells colleciton, but for templated controls, we use find control.
Like this:
Dim cActive As CheckBox = e.Row.FindControl("chkActive")
If cActive.Checked Then
Dim lblDes As Label = e.Row.FindControl("lblDescript")
lblDes.Font.Italic = True
e.Row.Cells(4).BackColor = System.Drawing.Color.LightGray
End If
NOTE how we EVEN set the font to italic in the label control.
And now we see this:
NOTE VERY close how we use findcontrol to get those templated controls.
Last but not least - bonus:
let's highlight the whole row for active, and NOT EVEN have the check box column in the GV (but it is in the database source).
So, say this markup for the columns:
<Columns>
<asp:BoundField DataField="FirstName" HeaderText="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="HotelName" HeaderText="HotelName" />
<asp:BoundField DataField="City" HeaderText="City" />
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<asp:Label ID="lblDescript" runat="server"
Text='<%# Eval("Description") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
So, "active" check box is NOT EVEN displayed in the GV, (but, it is in the data source that feeds the gv).
So, we can do this:
Protected Sub GridView1_RowDataBound(sender As Object, e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
Dim gData As DataRowView = e.Row.DataItem ' Grid data - NOT the GV row!!!!!!
If gData.Item("Active") = True Then
e.Row.Style.Add("Background-color", "LightGray") ' highlight whole row.
End If
End If
End Sub
And we now get this:
Just keep in mind that the "dataitem" (the full database row) is ONLY avaiable during the row data bind, and it WILL/DOES go out of scope once data binding is complete.
so basically using pretty much similar logics as albert's reply, I ended up catching two last rows manually and changing their colors.
protected void grdReports_PreRender(object sender, EventArgs e)
{
//finding 2 last rows, changing backcolor to the sum specified color '#5D7B9D' and the forecolor to white
//first table ( annual )
GridViewRow lastRow = grdReports.Rows[grdReports.Rows.Count - 1];
lastRow.BackColor = System.Drawing.Color.FromName("#5D7B9D");
lastRow.ForeColor = Color.White;
GridViewRow secondToLastRow = grdReports.Rows[grdReports.Rows.Count - 2];
secondToLastRow.BackColor = System.Drawing.Color.FromName("#5D7B9D");
secondToLastRow.ForeColor = Color.White;
//second table ( requested )
GridViewRow lastRowSecond = grdReports2.Rows[grdReports2.Rows.Count - 1];
lastRowSecond.BackColor = System.Drawing.Color.FromName("#5D7B9D");
lastRowSecond.ForeColor = Color.White;
GridViewRow secondToLastRowSecond = grdReports2.Rows[grdReports2.Rows.Count - 2];
secondToLastRowSecond.BackColor = System.Drawing.Color.FromName("#5D7B9D");
secondToLastRowSecond.ForeColor = Color.White;
}
I have a drop down list 'Country', 'city' text box and an 'Add' button. The country drop down is NOT mandatory so I can just add a city without a country, adding an empty 'country' to the gridview works OK. the problem when I click on 'Edit' in the gridview it binds it to the first country in the list it does not just show a blank:
<asp:DropDownList ID="DDLCountry" runat="server" AutoPostBack="true" AppendDataBoundItems="true" OnSelectedIndexChanged="DDLCountry_SelectedIndexChanged" InitialValue="">
<asp:ListItem Text="------------------------ Select ------------------------" Value="" />
</asp:DropDownList>
<asp:TextBox ID="txtCity" runat="server"></asp:TextBox>
<asp:Button ID="btnNewLList" runat="server" OnClick="btnNewLList_Click" Text="Add new Country"/>
<asp:GridView ID="gvAddNewCountry" runat="server" AutoGenerateColumns="False" DataKeyNames="ID" OnRowCommand="gvAddNewCountry_RowCommand" OnRowDeleting="gvAddNewCountry_RowDeleting" OnRowDataBound="gvAddNewCountry_RowDataBound" OnRowUpdating="gvAddNewCountry_RowUpdating" OnRowEditing="gvAddNewCountry_RowEditing" OnRowCancelingEdit="gvAddNewCountry_RowCancelingEdit" ShowHeaderWhenEmpty="True">
<EmptyDataTemplate>
No Data
</EmptyDataTemplate>
<Columns>
<asp:TemplateField HeaderText="Actions">
<ItemTemplate>
<asp:Button ID="btnEdit" runat="server" Text="Edit"/>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ButtonType="Button" ShowEditButton="true" ShowCancelButton="true">
</asp:CommandField>
<asp:TemplateField HeaderText="Country>
<ItemTemplate>
<asp:Label ID="lblCountry" runat="server" Text='<% #Eval("Country") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DDCountry" runat="server" AppendDataBoundItems="True" AutoPostBack="false"></asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>
Code behind:
Protected Sub gvAddNewCountry_RowCommand(sender As Object, e As GridViewCommandEventArgs)
If e.CommandName = "Edit" Then
Dim rowCountryToEdit As Integer = e.CommandArgument
Dim ddListCountry As DropDownList = (CType(gvAddNewCountry.Rows(CInt(e.CommandArgument)).FindControl("DDCountry"), DropDownList))
ddListCountry.DataSource = (From x In Country Where x.Domain = "lCountry" Order By x.Description Select x).ToList()
ddListCountry.DataTextField = "Description"
ddListCountry.DataValueField = "ID"
ddListCountry.DataBind()
End If
End Sub
Thanks for your help X
Ok, so when you have/want a ddl in a gv row?
We require TWO steps.
First step: Load up the list of choices for the dll
2nd step: set the ddl to the current row value, or blank (no choice) if null no value exists yet for the current row. This ALSO means we have to get/grab the current row value for the dll, and set the ddl to reflect this existing choice.
So, this is a two step process.
And the "event" we typical use for this is the row bind event. (all such controls from listview, gridview and more have this event).
Also, a VERY nice helper tip? During (but ONLY during) the data bind event, you have FULL USE of ALL columns from the data source - EVEN COLUMNS NOT in the gv!!!
I don't have a entity database first setup that you have, but lets load up a gv with a combo box:
So, our gv:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
CssClass="table table-hover" Width="50%"
DataKeyNames="ID">
<Columns>
<asp:BoundField DataField="FirstName" HeaderText="First Name" />
<asp:BoundField DataField="LastName" HeaderText="First Name" />
<asp:BoundField DataField="HotelName" HeaderText="Hotel Name" />
<asp:BoundField DataField="City" HeaderText="City" />
<asp:BoundField DataField="Description" HeaderText="Descripiton" />
<asp:TemplateField HeaderText="Rating">
<ItemTemplate>
<asp:DropDownList ID="cboRating" runat="server"
DataTextField="Rating"
DataValueField="ID">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
And our code to fill is this:
Dim rstRating As New DataTable
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
LoadGrid()
End If
End Sub
Sub LoadGrid()
' get data for rating combo
rstRating = MyRst("SELECT ID, Rating FROM tblRating ORDER BY ID")
' get data for grid
GridView1.DataSource = MyRst("SELECT * FROM tblHotelsA ORDER BY HotelName")
GridView1.DataBind()
End Sub
Public Function MyRst(strSQL As String) As DataTable
Dim rstData As New DataTable
Using conn As New SqlConnection(My.Settings.TEST4)
Using cmdSQL As New SqlCommand(strSQL, conn)
conn.Open()
rstData.Load(cmdSQL.ExecuteReader)
End Using
End Using
Return rstData
End Function
Note VERY carefull in above, I created a page wide (class wide) data table called rstRating. This will go out of scope after the data bind, but we ONLY need it to persit DURING the gv data bind operating (since for each row of the gv, we don't want to run that query over and over - we need this same pick list for the dll).
Ok, so now we see/get this:
The only part we need is to load up the dll, and set it for each row. We use the RowDataBound event.
So, code for that was this:
Protected Sub GridView1_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles GridView1.RowDataBound
' bind drop down for each row
If e.Row.RowType = DataControlRowType.DataRow Then
' get combo
Dim rDrop As DropDownList = e.Row.FindControl("cboRating")
rDrop.DataSource = rstRating
rDrop.DataBind()
rDrop.Items.Insert(0, New ListItem("Please Select", "0"))
' now get current row value for rating.
Dim gData As DataRowView = e.Row.DataItem
If IsDBNull(gData("Rating")) = False Then
rDrop.Text = gData("Rating")
End If
End If
End Sub
So, for each row, get the dll.
For for that row, load up with choices
And THEN for that row, set the ddl to the current row value (but check for null, and don't set - it will then show our "select" choice value.
I am new with .net!
I have two gridviews connected to a large database. The first one is returning a list of issues searched by ID while the other is returning the issues searched by subject.
I am trying to get the ID from the gridview returning issues from a select button but when I use selectedRow it doesn't return anything.
I tried multiple methods and this is what I have now. Any Suggestions?
Protected Sub IssuesGV_SelectedIndexChanging(ByVal sender As Object, ByVal e As GridViewSelectEventArgs)
Dim pName As String
pName = IssuesGV.SelectedRow.Cells(0).Text
BindGridComments(pName)
End Sub
Protected Sub IssuesGV_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
e.Row.Attributes("onmouseover") = "this.style.backgroundColor='aquamarine';"
e.Row.Attributes("onmouseout") = "this.style.backgroundColor='white';"
e.Row.ToolTip = "Click last column for selecting this row."
' e.Row.Cells(0).Attributes.Add("onclick", )
End If
End Sub
Protected Sub IssuesGV_RowCommand(sender As Object, e As GridViewCommandEventArgs)
' ' Dim row As GridViewRow = IssuesGV.Rows(rowIndex)
' v = row.Cells(1).Text
'v = IssuesGV.SelectedRow.Cells(0).Text
' TextBox1.Text = v
'TextBox1.Text = v
If (e.CommandName = "Select1") Then
Dim index As Int16
index = Convert.ToInt32(e.CommandArgument)
Dim row As GridViewRow
row = IssuesGV.Rows(index)
Dim item As ListItem
item.Text = Server.HtmlDecode(row.Cells(0).Text)
End If
End Sub
My gridview code is the following (the one where I am using the select button):
<asp:GridView ID="IssuesGV" runat="server" AutoPostBack="true" OnRowCommand ="IssuesGV_RowCommand" OnRowDataBound="IssuesGV_RowDataBound" OnSelectedIndexChanged = "IssuesGV_OnSelectedIndexChanged" SelectedIndexChaning ="IssuesGV_SelectedIndexChanging" AutoGenerateColumns="False" DataKeyNames="number" DataSourceID="IssueDS" EnableModelValidation="True">
<Columns>
<asp:BoundField DataField="number" HeaderText="number" ReadOnly="True" SortExpression="number" />
<asp:BoundField DataField="subject" HeaderText="subject" SortExpression="subject" />
<asp:BoundField DataField="description" HeaderText="description" SortExpression="description" />
<asp:BoundField DataField="created_at" HeaderText="created_at" SortExpression="created_at" />
<asp:BoundField DataField="opener_name" HeaderText="opener_name" SortExpression="opener_name" />
<asp:BoundField DataField="project_name" HeaderText="project_name" SortExpression="project_name" />
<asp:ButtonField Text="Select" CommandName="Select1" ItemStyle-Width="30" ButtonType="Button" HeaderText="Select" ShowHeader="True" SortExpression="number" >
<ItemStyle Width="30px" />
</asp:ButtonField>
</Columns>
</asp:GridView>
The error I am receiving is this one:
System.ArgumentOutOfRangeException HResult=0x80131502
Message=Index was out of range. Must be non-negative and less than the
size of the collection. Parameter name: index Source= StackTrace:
Many Thanks!
Front End:
Your GridView should look like this:
<asp:GridView ID="IssuesGV" runat="server" AutoGenerateColumns="false"
OnSelectedIndexChanged="IssuesGV_OnSelectedIndexChanged">
<Columns>
<asp:BoundField DataField="number" HeaderText="number" />
...Some Other Fields
<asp:ButtonField Text="Select" CommandName="Select" ItemStyle-Width="150" />
</Columns>
</asp:GridView>
Back End:
Then add this code OnSelectedIndexChanged of GridView:
Protected Sub IssuesGV_OnSelectedIndexChanged(sender As Object, e As EventArgs)
'Accessing Selected BoundField Column
Dim number As String = IssuesGV.SelectedRow.Cells(0).Text
label.Text = "<b>Number Value:</b> " & number & " <b>"
End Sub
Ref: See full example here.
Edit
For some reason, if OnSelectedIndexChanged method is not firing then you've just need to add below attribute in your GridView header markup:
AutoGenerateSelectButton="True"
This will create a Select link in your GridView rows, which'll fire the OnSelectedIndexChanged method.
PS: If above all workarounds not works then see this post.
I have a gridview with both autogenerated columns and template field.
I am using GridView.RowCreated to move my template field to the rightmost side. However, what I need to do is to put it in between HOUR column and NAME column.
Is it possible to insert the template field column in between auto-generated columns?
VB.NET
Dim dt As New DataTable()
dt.Columns.Add("Date", GetType(String))
dt.Columns.Add("Hour", GetType(Integer))
dt.Columns.Add("Name", GetType(String))
dt.Columns.Add("Status", GetType(String))
'fill table
GridView1.DataSource = dt
GridView1.DataBind()
RowCreated code
Private Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowCreated
Dim row As GridViewRow = e.Row
' Intitialize TableCell list
Dim columns As New List(Of TableCell)()
For Each column As DataControlField In GridView1.Columns
'Get the first Cell /Column
Dim cell As TableCell = row.Cells(0)
' Then Remove it after
row.Cells.Remove(cell)
'And Add it to the List Collections
columns.Add(cell)
Next
row.Cells.AddRange(columns.ToArray())
End Sub
ASPX
<asp:GridView ID="GridView1" runat="server" CssClass="Grid">
<RowStyle Font-Bold="False" HorizontalAlign="Left" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
<Columns>
<asp:TemplateField HeaderText="Control" ShowHeader="True" Visible="True"
ItemStyle-HorizontalAlign="Center">
<HeaderTemplate> View </HeaderTemplate>
<ItemTemplate>
<asp:ImageButton ID="B_SHOW" runat="server" ImageUrl="~/MA/Images and Icons/zoom-icon.png" Width="22px" Height="22px" CommandArgument='<%# DataBinder.Eval(Container, "RowIndex") %>' CommandName="EXECUTE_QUERY"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
You can arrange the Columns of a GridView in any order.
Use the CloneFields() method to create a copy of your Columns. After that clear the GridView's Column collection and re-add the Columns in required order.
Dim columnsCollection As DataControlFieldCollection =
GridView1.Columns.CloneFields()
GridView1.Columns.Clear()
' Now add the Columns one by one in any order
' add 3rd column as the FIRST Column
GridView1.Columns.Add(columnsCollection(3))
' Add 7th Column as Second Column
GridView1.Columns.Add(columnsCollection(7))
You can also use Insert() Method, if need be::
GridView1.Columns.Insert(0, columnsCollection(3))
I am having a lot of trouble getting a dropdown to bind with data from my database with the appropriate departments.
This is what I have so far:
HTML:
<asp:GridView ID="gridDepartmentHistory" runat="server" AutoGenerateColumns="False" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True">
<Columns>
<asp:TemplateField HeaderText="Department">
<ItemTemplate>
<asp:Label ID="lblDepartment" runat="server" Visible="true" Text='<%# Eval("Department")%>'></asp:Label>
<asp:DropDownList ID="ddlDepartment" runat="server">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Start Date" HeaderText="Start Date" />
<asp:BoundField DataField="End Date" HeaderText="End Date" />
</Columns>
</asp:GridView>
Code behind:
Protected Sub gridDepartmentHistory_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles gridDepartmentHistory.RowDataBound
If (e.Row.RowType = DataControlRowType.DataRow) Then
Dim ddlDepartment As DropDownList = CType(e.Row.FindControl("ddlDepartment"), DropDownList)
Dim list As ICollection(Of Department) = Department.hrGetDepartmentList() 'Class method to fill a collection of items with the Department's Name and ID
ddlDepartment.DataSource = list
ddlDepartment.DataTextField = "Name"
ddlDepartment.DataValueField = "ID"
ddlDepartment.DataBind()
Dim dept As String = CType(e.Row.FindControl("lblDepartment"), Label).Text
ddlDepartment.Items.FindByText(dept).Selected = True
End If
End Sub
When I run this it throws an exception saying:
Object reference not set to an instance of an object.
BTW: I am using this tutorial to help me through: http://www.aspsnippets.com/Articles/How-to-populate-DropDownList-in-GridView-in-ASPNet.aspx
Any help would be greatly appreciated! Thank you!
You simply need to retrieve dept id and store it in gridview as hidden (if you don't want to display it).
Dim dept As String = CType(e.Row.FindControl("lblDepartmentId"), Label).Text
ddlDepartment.SelectedValue = dept;
Hope it helps.
Your problem is that you ara trying to find the contorl in the row but is inside a table cell.
Try this.
Dim cbo As DropDownList = CType(YourDGV.Rows(x).Cells(0).FindControl("ddlDepartment"), DropDownList)