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get firstname lastname using userid

Is it possible to get the First and lastname of a user using the userID, using the code below?

Currently I am getting error: Exception Details: System.FormatException: Input string was not in a correct format.
Which I believe is pointing to the User Provider Key.  What other way can I supply the UserID as Current User ID.
<LoggedInTemplate>
               <asp:SqlDataSource ID="UserNameDS" runat="server" 
                        ConnectionString="<%$ ConnectionStrings:rmeaspnetdbConnectionString %>" 
                        SelectCommand="SELECT * FROM [aspnet_UserName] WHERE ([UserID] = @UserID)">
                <SelectParameters>
                        <asp:Parameter DefaultValue="<%=User.ProviderUserKey.ToString()%>" Name="UserID" Type="Int32" />
                </SelectParameters>
                </asp:SqlDataSource>                   
                Welcome <asp:FormView ID="UserNameFV" runat="server" DataKeyNames="UserID"
                      DataSourceID="UserNameDS" Height="21px" Width="185px">
                      <ItemTemplate>
                          <asp:Label ID="FirstName" runat="server" Text='<%#Bind("[FirstName]")%>' />
                          <asp:Label ID="Spacer" runat="server" Text=" " /> 
                          <asp:Label ID="LastName" runat="server" Text='<%#Bind("[LastName]")%>' />
                      </ItemTemplate>
                    </asp:FormView> |
                        <a href="/my-account/">My Account</a> |
                    
               </LoggedInTemplate>

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Robert Treadwell
Asked:
Robert Treadwell
1 Solution
 
StephanLead Software EngineerCommented:
Response.write the provideruserkey to check what value it has. If it is a non-numeric value, you need to consider an alternative to know the userID, you can also use the Username I suppose? That's User.Identity.Name
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YZlatCommented:
try converting user provider key to integer first

<LoggedInTemplate>
               <asp:SqlDataSource ID="UserNameDS" runat="server"
                        ConnectionString="<%$ ConnectionStrings:rmeaspnetdbConnectionString %>"
                        SelectCommand="SELECT * FROM [aspnet_UserName] WHERE ([UserID] = @UserID)">
                <SelectParameters>
                        <asp:Parameter DefaultValue="<%=CInt(User.ProviderUserKey.ToString())%>" Name="UserID" Type="Int32" />
                </SelectParameters>
                </asp:SqlDataSource>                  
                Welcome <asp:FormView ID="UserNameFV" runat="server" DataKeyNames="UserID"
                      DataSourceID="UserNameDS" Height="21px" Width="185px">
                      <ItemTemplate>
                          <asp:Label ID="FirstName" runat="server" Text='<%#Bind("[FirstName]")%>' />
                          <asp:Label ID="Spacer" runat="server" Text=" " />
                          <asp:Label ID="LastName" runat="server" Text='<%#Bind("[LastName]")%>' />
                      </ItemTemplate>
                    </asp:FormView> |
                        <a href="/my-account/">My Account</a> |
                   
               </LoggedInTemplate>
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YZlatCommented:
or try

<LoggedInTemplate>
               <asp:SqlDataSource ID="UserNameDS" runat="server"
                        ConnectionString="<%$ ConnectionStrings:rmeaspnetdbConnectionString %>"
                        SelectCommand="SELECT * FROM [aspnet_UserName] WHERE ([UserID] = @UserID)">
                <SelectParameters>
                        <asp:Parameter DefaultValue="<%=CInt(User.ProviderUserKey)%>" Name="UserID" Type="Int32" />
                </SelectParameters>
                </asp:SqlDataSource>                  
                Welcome <asp:FormView ID="UserNameFV" runat="server" DataKeyNames="UserID"
                      DataSourceID="UserNameDS" Height="21px" Width="185px">
                      <ItemTemplate>
                          <asp:Label ID="FirstName" runat="server" Text='<%#Bind("[FirstName]")%>' />
                          <asp:Label ID="Spacer" runat="server" Text=" " />
                          <asp:Label ID="LastName" runat="server" Text='<%#Bind("[LastName]")%>' />
                      </ItemTemplate>
                    </asp:FormView> |
                        <a href="/my-account/">My Account</a> |
                   
               </LoggedInTemplate>
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JayFromPepCommented:
What database are you using?  If you are using the default aspnet membership database created by visual studio, at least in mine, there is no table called aspnet_UserName.

Assuming you are using that, then your select statement should be...

SELECT * FROM aspnet_Users WHERE userid=@userid

That would return a user record from the table, wherein you would find the username.  However, it may or may not be the first and last name, depending on how you have your membership setup.

If you are using profiles, and have the first and last name recorded in the profile, then you could get at it that way.
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puru1981Commented:
If you are using aspnet membership then userid is a GUID so change the datatype of userid from Int32 to GUID .

Happy Coding :)
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Robert TreadwellManaging DirectorAuthor Commented:
UserID was also in uniqueidentifier format, added another column containing usernameID
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