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How to update a dataset row when user update a template field in  gridview

Posted on 2007-11-22
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Last Modified: 2012-06-21
Hello Experts,

I have a gridview with template fields(Dropdown) which is bound to a column in dataset. ... on a button click the record get added to a gridview... once the record is displayed in the gridview the user should be able to change the Method : to either Rnd or Pror.

How do I update my dataset based on user changes.

please guide.

I add the code... the first shows the gridview and its column

and the other one is click event of abutton that adds row to the dataset and then displayed in the gridview.


<asp:Panel ID="Panel1" runat="server" Height="136px" ScrollBars="Vertical" Style="z-index: 118;

                        left: 440px; position: absolute; top: 96px" Width="472px" BorderColor="Blue" BorderWidth="1px">

                        <asp:GridView ID="GridView1" runat="server"

                            Font-Names="Arial" Font-Size="7pt" Style="z-index: 100; left: 0px; position: absolute;

                            top: 0px" Width="456px" ShowHeader="False" AutoGenerateColumns="False" >

                                  <Columns>

                                  <asp:TemplateField>

                                    <ItemTemplate>

                                     &nbsp;<asp:Button ID="btnRowButton1" runat="server"   CommandName="Exclude" Text="x" Width="12px" Font-Names="Arial" Font-Size="7pt" Height="16px" style="text-align: center" />

                                        

                                    </ItemTemplate>

                                </asp:TemplateField>

                

                <asp:BoundField DataField="SrNo" SortExpression="Rank" ControlStyle-BorderWidth ="6px" >

                    <ControlStyle BorderWidth="6px" />

                </asp:BoundField>

                <asp:BoundField DataField="FSName" SortExpression="Rank" ControlStyle-BorderWidth ="20px">

                    <ControlStyle BorderWidth="20px" />

                </asp:BoundField>

                <asp:BoundField DataField="EffDt" SortExpression="Rank" ControlStyle-BorderWidth ="10px">

                    <ControlStyle BorderWidth="10px" />

                </asp:BoundField>

                <asp:TemplateField>

               <ItemTemplate>

               <asp:TextBox ID="txtPOC" runat="server" text='<%#DataBinder.Eval(Container.DataItem, "POC") %>'

Font-Names="Arial" Font-Size="7pt" Width="32px"></asp:TextBox>

               </ItemTemplate>

               </asp:TemplateField>

                                      <asp:TemplateField>

                                          <ItemTemplate>

                                              <asp:DropDownList ID="ddnPOS24" runat="server" SelectedValue='<%#DataBinder.Eval(Container.DataItem, "POS24") %>' Font-Names="Arial" Font-Size="7pt"

                                                  Width="48px">

                                                  <asp:ListItem Selected="True">Fac</asp:ListItem>

                                                  <asp:ListItem>NonFac</asp:ListItem>

                                              </asp:DropDownList>

                                          </ItemTemplate>

                                      </asp:TemplateField>

                                      <asp:TemplateField>

                                          <ItemTemplate>

                                              <asp:TextBox ID="txtAnesCF" runat="server" text='<%#DataBinder.Eval(Container.DataItem, "AnesCF") %>' Font-Names="Arial" Font-Size="7pt" Width="24px"></asp:TextBox>

                                          </ItemTemplate>

                                      </asp:TemplateField>

               <asp:TemplateField>

               <ItemTemplate>

               <asp:DropDownList ID="ddnAMethod" runat="server"  SelectedValue='<%#DataBinder.Eval(Container.DataItem, "AnesMethod") %>' Font-Names="Arial" Font-Size="7pt"

                Width="48px">

                <asp:ListItem Selected="True">Rnd</asp:ListItem>

               <asp:ListItem>Pror</asp:ListItem>

                   <asp:ListItem></asp:ListItem>

               </asp:DropDownList>

               </ItemTemplate>

                </asp:TemplateField>

                

            </Columns>

                        </asp:GridView>

                    </asp:Panel>
 
 
 
 
 
 

Protected Sub btnAdd1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd1.Click

        Dim dr As Data.DataRow
 

        i = i + 1

        dr = ds.Tables(0).NewRow

        dr("srno") = i
 

        If lstFS.SelectedValue <> "" Then

            Call FS_Detail(lstFS.SelectedValue)

            dr("FSName") = lstFS.SelectedValue

            dr("Type") = "NonOption"

            dr("effDT") = txtDate.Text

            dr("POC") = Session("POC")

            dr("POS24") = Session("POS24")

            dr("AnesCF") = Session("ACF")

            dr("AnesMethod") = "Pror"

        Else

            Call FS_Detail(getMKTID(lstMyFS.SelectedValue))

            dr("FSName") = lstMyFS.SelectedValue

            dr("Type") = "NonOption"

            dr("effDT") = txtDate.Text

            dr("POC") = Session("POC")

            dr("POS24") = Session("POS24")

            dr("AnesCF") = Session("ACF")

            dr("AnesMethod") = "Rnd"

        End If
 

        ds.Tables(0).Rows.Add(dr)

        dv = New DataView(ds.Tables(0))

        dv.RowFilter = "Type='NonOption'"

        Me.GridView1.DataSource = dv

        Me.GridView1.DataBind()
 

        For i = 0 To (lstFS.Items.Count - 1)

            lstFS.Items(i).Selected = False

        Next

        For i = 0 To (lstMyFS.Items.Count - 1)

            lstMyFS.Items(i).Selected = False

        Next
 

    End Sub

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Question by:sanjaypandey
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6 Comments
 
LVL 12

Expert Comment

by:Mortaza Doulaty
Comment Utility
Change "Eval" in your code to Bind

For example for a text box you will have:
<asp:TextBox ID="txtPOC" runat="server" text='<%#DataBinder.Bind(Container.DataItem, "POC") %>'

Font-Names="Arial" Font-Size="7pt" Width="32px"></asp:TextBox>

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Author Comment

by:sanjaypandey
Comment Utility
Hello,

I get a error saying that bind is not a member of 'System.web.UI.DataBinder', Am I missing something?

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LVL 12

Expert Comment

by:Mortaza Doulaty
Comment Utility
This sample code may help:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="BlackListID"

            DataSourceID="AccessDataSource1">

            <Columns>

                <asp:BoundField DataField="BlackListID" HeaderText="BlackListID" InsertVisible="False"

                    ReadOnly="True" SortExpression="BlackListID" />

                <asp:BoundField DataField="Tel_vc" HeaderText="Tel_vc" SortExpression="Tel_vc" />

                <asp:BoundField DataField="Comments_vc" HeaderText="Comments_vc" SortExpression="Comments_vc" />

                <asp:TemplateField HeaderText="mrt">

                    <ItemTemplate>

                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Tel_vc") %>'></asp:TextBox>

                    </ItemTemplate>

                </asp:TemplateField>

            </Columns>

        </asp:GridView>

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LVL 12

Expert Comment

by:Mortaza Doulaty
Comment Utility
Note that the last column is a template column that have a text box that binded to a filed using:
Text='<%# Bind("Tel_vc") %>'
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Author Comment

by:sanjaypandey
Comment Utility
will this automatically update the DataSet... ?  It does help in that on autopostback , the dropdown retains the value that it was changed to ... but when I submit the dataset to a table ..it shows the original value and not the one to which it was changed to..

    <asp:TemplateField>
                                          <ItemTemplate>
                                              <asp:DropDownList ID="ddnPOS24" runat="server" SelectedValue='<%#Bind("POS24") %>' Font-Names="Arial" Font-Size="7pt"
                                                  Width="40px"  AutoPostBack="True">
                                                  <asp:ListItem Selected="True">Fac</asp:ListItem>
                                                  <asp:ListItem>NonFac</asp:ListItem>
                                              </asp:DropDownList>
                                          </ItemTemplate>
                                      </asp:TemplateField>




This is how I read the dataset:


 For i = 97 To ds.Tables(0).Rows.Count - 1
            varstrSQL = varstrSQL + " Insert into " & varSelectedFSTblName & "(Fsname,Eff_DT, DEFPOC,POS, AnesCF,AnesMethod,SelectionType,ModelType)"
            varstrSQL = varstrSQL + "values( '" & ds.Tables(0).Rows(i).Item(2) & "','" & ds.Tables(0).Rows(i).Item(3) & "','" & ds.Tables(0).Rows(i).Item(4) & "','" & ds.Tables(0).Rows(i).Item(5) & "',"
            varstrSQL = varstrSQL + "'" & ds.Tables(0).Rows(i).Item(6) & "','" & ds.Tables(0).Rows(i).Item(7) & "','" & ds.Tables(0).Rows(i).Item(9) & "','" & ds.Tables(0).Rows(i).Item(8) & "')"
            cm.CommandText = varstrSQL
            cm.CommandType = CommandType.Text
            cm.ExecuteNonQuery()
            varstrSQL = ""
        Next
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Accepted Solution

by:
Mortaza Doulaty earned 500 total points
Comment Utility
You should set the update query of your datasource to that your changes in dataset take effect in database.
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