Question

这是我第一次提出问题所以请耐心等待。我有GridView templatefields而datasource是Business Logic Layer方法，可以通过Data Access Layer检索员工列表，该列表可用作LinqToSql。

即使如此，当我尝试使用任何Northwind表的相同方法时，gridview始终为空，例如它工作正常，并且在Northwind网格上设置的相同属性在Employee网格上设置

值得一提的是，当我将AutoGenerateColumns设置为true时，它可以正常工作，但我想在编辑时进行第一次column(ID)读取。

编辑：我尝试混合数据绑定表达式：#Eval（），＃bind（）但没有任何工作，另一件事是当我按下编辑按钮时，数据正确显示在EditTemplate中，这很奇怪，为什么显示不起作用只是查看数据!!! 这是我的标记：

<asp:GridView ID="gvEmployees" runat="server" ShowFooter="true" AutoGenerateColumns="false"
            OnRowEditing="gvEmployees_RowEditing" OnRowUpdating="gvEmployees_RowUpdating"
            OnRowCancelingEdit="gvEmployees_RowCancelingEdit">
            <Columns>
                <asp:TemplateField HeaderText="EmployeeId">
                    <asp:ItemTemplate>
                        <asp:Label ID="lblId" runat="server" Text='<%# Eval("EmployeeId")%>'></asp:Label>
                    </asp:ItemTemplate>
                    <asp:FooterTemplate>
                        <asp:TextBox ID="txtEmployeeId" runat="server" ReadOnly="true" />
                    </asp:FooterTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="First Name">
                    <asp:ItemTemplate>
                        <asp:Label ID="lblFirstName" runat="server" Text='<%# Eval("FirstName")%>'></asp:Label>
                    </asp:ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtFirstName" runat="server" Text='<%# Eval("FirstName")%>'></asp:TextBox>
                    </EditItemTemplate>
                    <asp:FooterTemplate>
                        <asp:TextBox ID="txtFirstName" runat="server" />
                    </asp:FooterTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Last Name">
                    <asp:ItemTemplate>
                        <asp:Label ID="lblLasttName" runat="server" Text='<%# Eval("LastName")%>'></asp:Label>
                    </asp:ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtLastName" runat="server" Text='<%# Eval("LastName")%>'></asp:TextBox>
                    </EditItemTemplate>
                    <asp:FooterTemplate>
                        <asp:TextBox ID="txtLastName" runat="server" />
                    </asp:FooterTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Email">
                    <asp:ItemTemplate>
                        <asp:Label ID="lblEmail" runat="server" Text='<%# Eval("Email")%>'></asp:Label>
                    </asp:ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtEmail" runat="server" Text='<%# Eval("Email")%>'></asp:TextBox>
                    </EditItemTemplate>
                    <asp:FooterTemplate>
                        <asp:TextBox ID="txtEmail" runat="server" />
                    </asp:FooterTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:LinkButton ID="lnkRemove" runat="server" CommandArgument='<%# Eval("EmployeeId")%>'
                            OnClientClick="return confirm('Do you want to delete?')"
                            Text="Delete" OnClick="DeleteEmployee"></asp:LinkButton>
                    </ItemTemplate>
                    <FooterTemplate>
                        <asp:Button ID="btnAdd" runat="server" Text="Add" OnClick="AddNewEmployee" />
                    </FooterTemplate>
                </asp:TemplateField>
                <asp:CommandField ShowEditButton="true" />
            </Columns>
        </asp:GridView>

这是背后的代码：

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
            BindData();
    }

    private void BindData()
    {
        String conString = ConfigurationManager.ConnectionStrings["SampleDBContext"].ConnectionString;
        String path = "/Logs/WebSample.log";
        path = HttpContext.Current.Server.MapPath(path);
        BllService service = new BllService(conString, path);
        gvEmployees.DataSource = service.GetEmployess().AsEnumerable();
        gvEmployees.DataBind();
    }

    protected void gvEmployees_RowEditing(object sender, GridViewEditEventArgs e)
    {
        gvEmployees.EditIndex = e.NewEditIndex;
        BindData();
    }


    protected void AddNewEmployee(object sender, EventArgs e)
    {

    }

    protected void gvEmployees_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        gvEmployees.EditIndex = -1;
        BindData();
    }


    protected void gvEmployees_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {

    }

    protected void DeleteEmployee(object sender, EventArgs e)
    {
        LinkButton lnkRemove = (LinkButton)sender;
        //lnkRemove.CommandArgument;

    }

BLLService是名称表示业务逻辑层DLL，允许检索employeesess（LinqToSql）我附上了截屏1

提前致谢。米歇尔

手动绑定的GridView根本不显示数据

0 个答案: