C# 无法编辑嵌套的gridview，提供错误附加信息：语法错误：在'之后缺少操作数；fa9bb79'；操作人员

绑定子网格视图时出错。errro-在“fa9bb79”运算符后缺少操作数。单击父表时，应绑定未发生的子表值。我在这一行中遇到错误-“”

网格视图

<asp:GridView ID="gvParent" runat="server" AutoGenerateColumns="False" OnRowDataBound="gvParent_RowDataBound"
CellPadding="4" ForeColor="#333333" ShowHeader="True" DataKeyNames="uniqueid">
<Columns>
    <asp:TemplateField ItemStyle-Width="20px">
        <ItemTemplate>
            <asp:Image runat="server" ID="img1" ImageUrl="img/Collapse.GIF" />
        </ItemTemplate>
    </asp:TemplateField>
    <asp:BoundField HeaderText="Employee Id" DataField="ToAddress">
        <ItemStyle HorizontalAlign="Center" Width="160px" />
    </asp:BoundField>
    <asp:BoundField HeaderText="Employee Name" DataField="PODate">
        <ItemStyle HorizontalAlign="Center" Width="160px" />
    </asp:BoundField>
    <asp:BoundField HeaderText="Designation" DataField="PoNo">
        <ItemStyle HorizontalAlign="Center" Width="160px" />
    </asp:BoundField>
    <asp:TemplateField HeaderText="Location">
        <ItemTemplate>
            <asp:Label ID="lblEmpName" runat="server" Text='<%# Eval("Description")%>'></asp:Label>
            <asp:Literal runat="server" ID="lit1" Text="</td><tr id='trCollapseGrid' style='display:none' ><td colspan='5'>" />
            <asp:GridView ID="gvChild" AutoGenerateColumns="False" runat="server" EnableViewState="False"
                DataKeyNames="uid" ForeColor="#333333" PageSize="2" AllowPaging="True"
                OnPageIndexChanging="gvChild_PageIndexChanging" OnRowCancelingEdit="gvChild_RowCancelingEdit"
                OnRowDeleting="gvChild_RowDeleting" OnRowEditing="gvChild_RowEditing" OnRowUpdating="gvChild_RowUpdating">
                <RowStyle BackColor="#EFF3FB" />
                <AlternatingRowStyle BackColor="White" />
                <Columns>
                    <asp:BoundField HeaderText="Skill ID" DataField="uid" ReadOnly="True">
                        <ItemStyle HorizontalAlign="Center" Width="80px" />
                    </asp:BoundField>
                    <asp:BoundField HeaderText="Employee Id" DataField="Comments" ReadOnly="True">
                        <ItemStyle HorizontalAlign="Center" Width="100px" />
                    </asp:BoundField>
                    <asp:TemplateField HeaderText="PartNo">
                        <ItemStyle HorizontalAlign="Center" Width="100px" />
                        <ItemTemplate>
                            <%# Eval("PartNo")%>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox ID="txtEditSkillSet" runat="server" Text=' <%# Eval("Qty")%>' Width="100px"></asp:TextBox>
                        </EditItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Remarks">
                        <ItemStyle HorizontalAlign="Center" Width="100px" />
                        <ItemTemplate>
                            <%# Eval("unitprice")%>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox ID="txtEditRemarks" runat="server" Text=' <%# Eval("unitprice")%>' Width="100px"></asp:TextBox>
                        </EditItemTemplate>
                    </asp:TemplateField>
                    <asp:CommandField ButtonType="Button" EditText="Edit" HeaderText="Edit" ShowEditButton="true" />
                    <asp:CommandField ButtonType="Button" DeleteText="Delete" HeaderText="Delete" ShowDeleteButton="true" />
                </Columns>
                <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            </asp:GridView>


private void BindChildgvwChildView(string empId, System.Web.UI.WebControls.GridView gvChild)
{
    DataTable dtChildTable = GetChildTableData();
    DataTable dtCloneChildTable = dtChildTable.Clone();


    DataRow[] gvChildRows = dtChildTable.Select("uid = " + empId);//2fa9bb79-7d0b-4e38-853c-d275d5d634c2
   // DataRow[] gvChildRows = dtChildTable.Select("uid = " + empId);


   // 2FA9BB79-7D0B-4E38-853C-D275D5D634C2
    foreach (DataRow gvChildRow in gvChildRows)
    {
        dtCloneChildTable.ImportRow(gvChildRow);
    }
    gvChild.DataSource = dtCloneChildTable;
    gvChild.DataBind();
}

私有void BindChildgvwChildView（字符串empId，System.Web.UI.WebControls.GridView gvChild）
{
DataTable dtChildTable=GetChildTableData（）；
DataTable dtCloneChildTable=dtChildTable.Clone（）；
DataRow[]gvChildRows=dtChildTable。选择（“uid=“+empId”）；//2fa9bb79-7d0b-4e38-853c-d275d5d634c2
//DataRow[]gvChildRows=dtChildTable.Select（“uid=“+empId”）；
//2FA9BB79-7D0B-4E38-853C-D275D5D634C2
foreach（gvChildRows中的数据行gvChildRow）
{
dtCloneChildTable.ImportRow（gvChildRow）；
}
gvChild.DataSource=dtCloneChildTable；
gvChild.DataBind（）；
}

<asp:GridView ID="gvParent" runat="server" AutoGenerateColumns="False" OnRowDataBound="gvParent_RowDataBound"
CellPadding="4" ForeColor="#333333" ShowHeader="True" DataKeyNames="uniqueid">
<Columns>
    <asp:TemplateField ItemStyle-Width="20px">
        <ItemTemplate>
            <asp:Image runat="server" ID="img1" ImageUrl="img/Collapse.GIF" />
        </ItemTemplate>
    </asp:TemplateField>
    <asp:BoundField HeaderText="Employee Id" DataField="ToAddress">
        <ItemStyle HorizontalAlign="Center" Width="160px" />
    </asp:BoundField>
    <asp:BoundField HeaderText="Employee Name" DataField="PODate">
        <ItemStyle HorizontalAlign="Center" Width="160px" />
    </asp:BoundField>
    <asp:BoundField HeaderText="Designation" DataField="PoNo">
        <ItemStyle HorizontalAlign="Center" Width="160px" />
    </asp:BoundField>
    <asp:TemplateField HeaderText="Location">
        <ItemTemplate>
            <asp:Label ID="lblEmpName" runat="server" Text='<%# Eval("Description")%>'></asp:Label>
            <asp:Literal runat="server" ID="lit1" Text="</td><tr id='trCollapseGrid' style='display:none' ><td colspan='5'>" />
            <asp:GridView ID="gvChild" AutoGenerateColumns="False" runat="server" EnableViewState="False"
                DataKeyNames="uid" ForeColor="#333333" PageSize="2" AllowPaging="True"
                OnPageIndexChanging="gvChild_PageIndexChanging" OnRowCancelingEdit="gvChild_RowCancelingEdit"
                OnRowDeleting="gvChild_RowDeleting" OnRowEditing="gvChild_RowEditing" OnRowUpdating="gvChild_RowUpdating">
                <RowStyle BackColor="#EFF3FB" />
                <AlternatingRowStyle BackColor="White" />
                <Columns>
                    <asp:BoundField HeaderText="Skill ID" DataField="uid" ReadOnly="True">
                        <ItemStyle HorizontalAlign="Center" Width="80px" />
                    </asp:BoundField>
                    <asp:BoundField HeaderText="Employee Id" DataField="Comments" ReadOnly="True">
                        <ItemStyle HorizontalAlign="Center" Width="100px" />
                    </asp:BoundField>
                    <asp:TemplateField HeaderText="PartNo">
                        <ItemStyle HorizontalAlign="Center" Width="100px" />
                        <ItemTemplate>
                            <%# Eval("PartNo")%>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox ID="txtEditSkillSet" runat="server" Text=' <%# Eval("Qty")%>' Width="100px"></asp:TextBox>
                        </EditItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Remarks">
                        <ItemStyle HorizontalAlign="Center" Width="100px" />
                        <ItemTemplate>
                            <%# Eval("unitprice")%>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox ID="txtEditRemarks" runat="server" Text=' <%# Eval("unitprice")%>' Width="100px"></asp:TextBox>
                        </EditItemTemplate>
                    </asp:TemplateField>
                    <asp:CommandField ButtonType="Button" EditText="Edit" HeaderText="Edit" ShowEditButton="true" />
                    <asp:CommandField ButtonType="Button" DeleteText="Delete" HeaderText="Delete" ShowDeleteButton="true" />
                </Columns>
                <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            </asp:GridView>


private void BindChildgvwChildView(string empId, System.Web.UI.WebControls.GridView gvChild)
{
    DataTable dtChildTable = GetChildTableData();
    DataTable dtCloneChildTable = dtChildTable.Clone();


    DataRow[] gvChildRows = dtChildTable.Select("uid = " + empId);//2fa9bb79-7d0b-4e38-853c-d275d5d634c2
   // DataRow[] gvChildRows = dtChildTable.Select("uid = " + empId);


   // 2FA9BB79-7D0B-4E38-853C-D275D5D634C2
    foreach (DataRow gvChildRow in gvChildRows)
    {
        dtCloneChildTable.ImportRow(gvChildRow);
    }
    gvChild.DataSource = dtCloneChildTable;
    gvChild.DataBind();
}