I have a GridView set up:
<asp:GridView id="GridView1" Runat="server" AutoGenerateColumns="False" OnRowCommand = "GridView1_RowCommand" EnableViewState="true">
<Columns>
<asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="Center">
<ItemTemplate><asp:Button runat="server" ID="Delete" ImageUrl="~/images/Close.gif" CommandName="DeleteRow" CommandArgument="<%# CType(Container,GridViewRow).RowIndex %>"/></ItemTemplate></asp:TemplateField>
<asp:TemplateField HeaderText="Comment" ItemStyle-Width="175px">
<ItemTemplate><textarea class="raTextBox" id="txtItemComment" rows="4" cols="30"></textarea></ItemTemplate></asp:TemplateField>
</Columns>
</asp:GridView>
The RowCommand in code-behind is setup like:
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs)
If (e.CommandName = "DeleteRow") Then
//do stuff here
The GridView is data bound on Page Load as follows:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not IsPostBack Then
Session("CalledModule") = "RCMT0021"
Else
With ViewState
_intRepor = CInt(.Item("Report"))
End With
End If
DataBind() //Gridview Load
End Sub
My questions:
- The row command event is never fired. The page just goes into the ELSE (of Not is Postback) in Page_Load
- How can I keep track of what all is typed in the "Comments" column of each row (a TEXTAREA), and save the data to the database when a SAVE CHANGES (form) button is clicked?
Thanks!
UPDATE:
The Grid-View's Databinding is as follows:
Public Sub DataBind()
Dim clsDatabase As New clsDatabase
Dim cmd As New OleDbCommand()
Try
cmd.CommandText = "SELECT A, B FROM WHERE C = ? ORDER BY A"
Dim report As New OleDbParameter("@Report", _intReportNumber)
cmd.Parameters.Add(report)
cmd.Connection = clsDatabase.Open_DB()
Dim dReader As OleDbDataReader
dReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)
Dim dt As New DataTable
dt.Columns.Add(New DataColumn("PictureURL", GetType(String)))
dt.Columns.Add(New DataColumn("Seq", GetType(Int16)))
dt.Columns.Add(New DataColumn("ReportNumber", GetType(String)))
Do While (dReader.Read())
Dim dr As DataRow = dt.NewRow()
_strComments = dReader(0).ToString
dr("Seq") = dReader.GetInt16(1)
dr("PictureURL") = "GetImages.aspx?report=" + _intReportNumber.ToString + "&seq=" + dReader.GetInt16(1).ToString
dr("ReportNumber") = _intReportNumber.ToString
dt.Rows.Add(dr)
Loop
GridView1.DataSource = dt
GridView1.DataBind()
Catch err As Exception
End Try
End Sub
So basically, the GridView has three visible columns – a comments field, a picture field, and a field with a delete button (image) to delete the picture (and comments, if any) from the database. The 4th column is a hidden one, keeping track of the the Image ID of the images. I didn't include the picture and other columns for simplicity sake.
- The user can add comments, and when he clicks a 'SAVE CHANGES' button, the corresponding comments should get saved for the picture.
- The 'SELECT IMAGE' opens up a ModalDialogBox which enables the user to select the image. When closed, it causes a postback, and rebinds the gridview to display the image the user just selected. Therefore, I need the GridView to rebind on postback, or a way around this.
- The delete imagebutton (in gridview) should delete the image and comments from the database.
Thanks again!
Best Answer
try this structure...
aspx page: (note
textarea
hasrunat="server"
)aspx.cs: