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display image from sql server in asp.net gridview

Posted on 2013-01-29
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Last Modified: 2013-01-30
I need to display rows from a table of images in Sql Server in a gridview.  The data is of type image, loaded as byte arrays.  I'm confused by the several methods in the literature: with or without handler, as a field or control, whatever.  Here's some of my [not working] code.  The other fields display just fine.
<asp:GridView ID="EditImagesGV" runat="server" AllowPaging="True" DataKeyNames="ImageId"
        AutoGenerateColumns="False" DataSourceID="EditImagesLDS">
        <Columns>
            <asp:TemplateField HeaderText="Choose action" ShowHeader="true">
               <ItemTemplate>
                <asp:Button ID="btnEditImagesGV" runat="server" CausesValidation="False" 
                        CommandName="Edit" Text="Edit">
                    </asp:Button> &nbsp;
                    <asp:Button ID="btnDeleteGVRecord" runat="server" CausesValidation="False" 
                        OnClientClick="return confirm('Are you sure you want to delete this record?')"
                        CommandName="Delete" Text="Delete" >
                    </asp:Button>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:Button ID="Button1" runat="server" CausesValidation="false" 
                        CommandName="Update" Text="Update">
                    </asp:Button> &nbsp;
                    <asp:Button ID="btnCancel" runat="server" CausesValidation="False" 
                        CommandName="Cancel" Text="Cancel">
                    </asp:Button>
                </EditItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="ImageId" HeaderText="ImageId" ReadOnly="True" SortExpression="ImageId" />
            <asp:Boundfield DataField="imageDisplayOrder" HeaderText="DisplayOrder" sortExpression="DisplayOrder" visible="true" />
            <asp:BoundField DataField="imageTitle" HeaderText="Title" Visible=true />
            <asp:BoundField DataField="imageDescription" HeaderText="Description" Visible=true />
            <asp:BoundField DataField="equipmentId" HeaderText="equipmentId" 
                ReadOnly="True" Visible="False" />
            <asp:BoundField DataField="imageFileName" HeaderText="FileName" 
                ReadOnly="True" SortExpression="imageFileName" />
            <asp:TemplateField HeaderText="Image">
            <ItemTemplate>
                <asp:Image ID="Image1" runat="server" width=150px CSSclass = "ImageZoom"
                    ImageURL=<%# eval("imageContent") %>  />
            </ItemTemplate>
        </asp:TemplateField>
        </Columns>
    </asp:GridView>
    <asp:LinqDataSource ID="EditImagesLDS" runat="server" enableUpdate=true EnableInsert=true EnableDelete=true
        ContextTypeName="lucidequipmentDataContext" EntityTypeName="" 
        OrderBy="imageDisplayOrder" 
        where= "equipmentID==@equipmentMasterID"
        TableName="equipmentImages">
        <UpdateParameters>
            <asp:Parameter name="imageTitle" type= "string" />
            <asp:Parameter Name="imageDescription" Type="String" />
            <asp:Parameter Name="imageDisplayOrder" Type=Int32 />
        </UpdateParameters>
    </asp:LinqDataSource>

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in the code behind I've got

 Protected Sub EditImagesLDS_Selecting(sender As Object, e As System.Web.UI.WebControls.LinqDataSourceSelectEventArgs) Handles EditImagesLDS.Selecting
        Dim keyId As Integer = Session("keyId")
        e.WhereParameters("equipmentMasterID") = keyId
    End Sub

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An equipmentMaster table supplies an ID which is used to pull the images from the equipmentImages table associated with that ID.

I need some direction
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Question by:Mark Klein
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3 Comments
 
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Expert Comment

by:deviprasadg
ID: 38833894
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LVL 10

Accepted Solution

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Monica P earned 2000 total points
ID: 38834409
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Author Closing Comment

by:Mark Klein
ID: 38835657
both suggestions probably will work, but the second was easier for me.  I built a similar handler. thanks for the help
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