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03.28.2008 at 10:48AM PDT, ID: 23278003
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7.8

dynamic datasource of an embedded gridview in ASP.NET

Zones: .Net Editors & IDEs, Programming for ASP.NET, Visual Studio .NET 2005
I am displaying a gridview that has a template field containing a second gridview. The internal gridview needs to contain differing amounts based on a content field of the external gridview. I have created 2 datasource for the internal gridview, and am able, in the row databound event of the external grid, to pass the correct data. How do I dynamically change the datasource internally?
Here is my code, but page just hangs
If Mid(e.Row.Cells(2).Text, 5, 1) = "6" Then
                Dim s2 As SqlDataSource = CType(e.Row.FindControl("Sqlsrfees6"), SqlDataSource)
                s2.SelectParameters(0).DefaultValue = e.Row.Cells(0).Text
                s2.SelectParameters(1).DefaultValue = e.Row.Cells(1).Text
            Else
                Dim s2 As SqlDataSource = CType(e.Row.FindControl("Sqlsrfees"), SqlDataSource)
                s2.SelectParameters(0).DefaultValue = e.Row.Cells(0).Text
                s2.SelectParameters(1).DefaultValue = e.Row.Cells(1).Text
            End If
            e.Row.Cells(8).TemplateControl.DataBind()
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Question Stats
Zone: Programming
Question Asked By: dfisher6
Solution Provided By: dfisher6
Participating Experts: 1
Solution Grade: A
Views: 168
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03.28.2008 at 12:03PM PDT, ID: 21233238

Rank: Genius

TheLearnedOne:

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03.28.2008 at 12:08PM PDT, ID: 21233279
dfisher6:

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03.28.2008 at 12:14PM PDT, ID: 21233315

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TheLearnedOne:

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03.28.2008 at 02:00PM PDT, ID: 21234113
dfisher6:

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03.28.2008 at 02:04PM PDT, ID: 21234137

Rank: Genius

TheLearnedOne:

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04.04.2008 at 12:34PM PDT, ID: 21284981
dfisher6:

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03.28.2008 at 12:03PM PDT, ID: 21233238

Rank: Genius

TheLearnedOne:
The page usually takes a long time to load if you are loading a lot of data.

Bob
 
03.28.2008 at 12:08PM PDT, ID: 21233279
dfisher6:
The control is by definition tied to the sqlsrfess data source - it usually loads in 3-4 seconds. I waited 10 minutes after putting the databind line in  - any ideas? Is the syntax correct?
 
03.28.2008 at 12:14PM PDT, ID: 21233315

Rank: Genius

TheLearnedOne:
Can you show me the HTML text for the GridView?

Bob
 
03.28.2008 at 02:00PM PDT, ID: 21234113
dfisher6:
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" BackColor="White"
            BorderColor="#336666" BorderStyle="Double" BorderWidth="3px" CellPadding="4"
            DataSourceID="SqlNonCredit" EmptyDataText="No classes match your selection criteria" Font-Size="Small" GridLines="Horizontal" HorizontalAlign="Left" Width="100%">
            <FooterStyle BackColor="White" ForeColor="#333333" />
            <Columns>
                <asp:BoundField DataField="TERM_CODE_KEY" SortExpression="TERM_CODE_KEY" >
                   
                </asp:BoundField>
                <asp:BoundField DataField="CRN_KEY" HeaderText="CRN" SortExpression="CRN_KEY" />
                <asp:BoundField DataField="Course" HeaderText="Course" />
                <asp:BoundField DataField="TITLE" HeaderText="Title" SortExpression="TITLE" />
                <asp:BoundField DataField="SEATS_AVAILABLE" HeaderText="Seats Available" SortExpression="SEATS_AVAILABLE" >
                   
                </asp:BoundField>
                <asp:TemplateField HeaderText="Meetings">
                   
                        <asp:SqlDataSource ID="SqlMeetings" runat="server" ConnectionString="<%$ ConnectionStrings:OracleConnect %>"
                            ProviderName="<%$ ConnectionStrings:OracleConnect.ProviderName %>" SelectCommand="SELECT DISTINCT SSRMEET_TERM_CODE, SSRMEET_CRN, SSRMEET_SUN_DAY || SSRMEET_MON_DAY || SSRMEET_TUE_DAY || SSRMEET_WED_DAY || SSRMEET_THU_DAY || SSRMEET_FRI_DAY || SSRMEET_SAT_DAY AS DAYS, TO_CHAR(TO_TIMESTAMP(SSRMEET_BEGIN_TIME, 'HH24:MI'), 'HH:MI A.M.') || NVL2(SSRMEET_BEGIN_TIME, '-', '') || TO_CHAR(TO_TIMESTAMP(SSRMEET_END_TIME, 'HH24:MI'), 'HH:MI A.M.') AS TIMES, TO_CHAR(SSRMEET_START_DATE, 'MM/DD/YYYY') || '-' || TO_CHAR(SSRMEET_END_DATE, 'MM/DD/YYYY') AS CLDATES FROM SATURN.SSRMEET WHERE (SSRMEET_TERM_CODE = :SSRMEET_TERM_CODE) AND (SSRMEET_CRN = :SSRMEET_CRN) ORDER BY CLDATES">
                            <SelectParameters>
                                <asp:Parameter Name="ssrmeet_term_code" />
                                <asp:Parameter Name="ssrmeet_crn" />
                            </SelectParameters>
                        </asp:SqlDataSource>
                        <asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" DataSourceID="SqlMeetings"
                            Width="350px" BorderStyle="None" ShowHeader="False">
                            <Columns>
                                <asp:BoundField DataField="CLDATES">
                                   
                                </asp:BoundField>
                                <asp:BoundField DataField="DAYS" NullDisplayText="TBA" ShowHeader="False" SortExpression="days" >
                                   
                                </asp:BoundField>
                                <asp:BoundField DataField="TIMES" ShowHeader="False" SortExpression="Times" >
                                   
                                </asp:BoundField>
                            </Columns>
                        </asp:GridView>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="site" HeaderText="Site" SortExpression="BLDG_DESC1" />
                <asp:BoundField DataField="Fees" DataFormatString="{0:c}" HeaderText="Fees" HtmlEncode="False" />
                <asp:TemplateField HeaderText="Sr Fees">
                   
                        <asp:SqlDataSource ID="SqlSrFees" runat="server" ConnectionString="<%$ ConnectionStrings:OracleConnect %>"
                            ProviderName="<%$ ConnectionStrings:OracleConnect.ProviderName %>" SelectCommand="SELECT SSRFEES_TERM_CODE, SSRFEES_CRN, SUM(SSRFEES_AMOUNT) AS SRFEES FROM SATURN.SSRFEES WHERE (SSRFEES_DETL_CODE <> 'TC') AND (SSRFEES_DETL_CODE <> 'TV') GROUP BY SSRFEES_TERM_CODE, SSRFEES_CRN HAVING (SSRFEES_TERM_CODE = :ssrfees_term_code) AND (SSRFEES_CRN = :ssrfees_crn)">
                            <SelectParameters>
                                <asp:Parameter DefaultValue="" Name="ssrfees_term_code" />
                                <asp:Parameter Name="ssrfees_crn" />
                            </SelectParameters>
                        </asp:SqlDataSource>
                        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BorderStyle="None"
                            DataSourceID="SqlSrFees" ShowHeader="False">
                            <Columns>
                                <asp:BoundField DataField="SRFEES" DataFormatString="{0:c}" HeaderText="SRFEES" HtmlEncode="False"
                                    ShowHeader="False" SortExpression="SRFEES">
                                   
                                </asp:BoundField>
                            </Columns>
                            <SelectedRowStyle BorderStyle="None" />
                        </asp:GridView><asp:SqlDataSource ID="SqlSrFees6" runat="server" ConnectionString="<%$ ConnectionStrings:OracleConnect %>"
                            ProviderName="<%$ ConnectionStrings:OracleConnect.ProviderName %>" SelectCommand="SELECT B.SSRFEES_TERM_CODE, B.SSRFEES_CRN, B.SSRFEES_AMOUNT * .75 + A.SRSUBFEES AS SRFEES FROM SATURN.SSRFEES B, (SELECT SSRFEES_TERM_CODE, SSRFEES_CRN, SUM(SSRFEES_AMOUNT) AS SRSUBFEES FROM SATURN.SSRFEES WHERE (SSRFEES_DETL_CODE <> 'TC') AND (SSRFEES_DETL_CODE <> 'TV') GROUP BY SSRFEES_TERM_CODE, SSRFEES_CRN HAVING (SSRFEES_TERM_CODE = :ssrfees_term_code) AND (SSRFEES_CRN = :ssrfees_crn)) A WHERE B.SSRFEES_CRN = A.SSRFEES_CRN AND B.SSRFEES_TERM_CODE = A.SSRFEES_TERM_CODE AND (B.SSRFEES_DETL_CODE = 'TC')">
                            <SelectParameters>
                                <asp:Parameter DefaultValue="" Name="ssrfees_term_code" />
                                <asp:Parameter Name="ssrfees_crn" />
                            </SelectParameters>
                        </asp:SqlDataSource>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
            <RowStyle BackColor="White" ForeColor="#333333" />
            <SelectedRowStyle BackColor="#339966" Font-Bold="True" ForeColor="White" />
           


            <HeaderStyle BackColor="#336666" Font-Bold="True" ForeColor="White" />
        </asp:GridView>

 
03.28.2008 at 02:04PM PDT, ID: 21234137

Rank: Genius

TheLearnedOne:
1) How many rows to you get for the outer GridView, if you aren't binding the inner GridView?

2) That inner query seems pretty complicated.

3) I have approached that problem a different way.

4) Bind the outer GridView to a DataSource.

5) Bind the inner GridView to a DataView with the RowFilter set to filter the values that relate to the current row.

Bob
 
04.04.2008 at 12:34PM PDT, ID: 21284981
dfisher6:
Here is how I changed the code to work (in the outer gridview row databound event:
If Mid(e.Row.Cells(2).Text, 5, 1) = "6" Then
                CType(e.Row.Cells(8).FindControl("GridView1"), GridView).DataSourceID = "sqlsrfees6"
                CType(e.Row.Cells(8).FindControl("GridView1"), GridView).DataBind()
                Dim s2 As SqlDataSource = CType(e.Row.FindControl("Sqlsrfees6"), SqlDataSource)
                s2.SelectParameters(0).DefaultValue = e.Row.Cells(0).Text
                s2.SelectParameters(1).DefaultValue = e.Row.Cells(1).Text
            Else
                CType(e.Row.Cells(8).FindControl("GridView1"), GridView).DataSourceID = "sqlsrfees"
                CType(e.Row.Cells(8).FindControl("GridView1"), GridView).DataBind()
                Dim s2 As SqlDataSource = CType(e.Row.FindControl("Sqlsrfees"), SqlDataSource)
                s2.SelectParameters(0).DefaultValue = e.Row.Cells(0).Text
                s2.SelectParameters(1).DefaultValue = e.Row.Cells(1).Text
            End If
Accepted Solution
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628