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<div>
    <asp:GridView ID="gvArea" runat="server" AutoGenerateColumns="False" OnRowCancelingEdit="gvArea_RowCancelingEdit"
        OnRowDeleting="gvArea_RowDeleting" OnRowEditing="gvArea_RowEditing" OnRowUpdating="gvArea_RowUpdating"
        CellPadding="4" ForeColor="#333333" GridLines="None">
        <RowStyle BackColor="#EFF3FB" />
        <Columns>
            <asp:TemplateField HeaderText="编号">
                <ItemTemplate>
                    <asp:Label ID="lblID" runat="server" Text='<%# Bind("ID") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="功能区">
                <EditItemTemplate>
                    <asp:TextBox ID="txtAreaName" runat="server" Text='<%# Bind("AreaName") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="lblName" runat="server" Text='<%# Bind("AreaName") %>'></asp:Label>
                </ItemTemplate>
                <FooterTemplate>
                    <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
                </FooterTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="描述">
                <EditItemTemplate>
                    <asp:TextBox ID="txtAreaDescription" runat="server" Text='<%# Bind("AreaDescription") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="lblDescription" runat="server" Text='<%# Bind("AreaDescription") %>'></asp:Label>
                </ItemTemplate>
                <FooterTemplate>
                    <asp:TextBox ID="txtDescription" runat="server"></asp:TextBox>
                </FooterTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="编辑" ShowHeader="False">
                <EditItemTemplate>
                    <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update"
                        Text="更新"></asp:LinkButton>
                    <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel"
                        Text="取消"></asp:LinkButton>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit"
                        Text="编辑"></asp:LinkButton>
                </ItemTemplate>
                <FooterTemplate>
                    <asp:Button ID="btnAdd" runat="server" Text="添 加" OnClick="btnAdd_Click" />
                    <asp:Button ID="btnCancel" runat="server" Text="取 消" OnClick="btnCancel_Click" />
                </FooterTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="删除" ShowHeader="False">
                <ItemTemplate>
                    <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Delete"
                        Text="删除"></asp:LinkButton>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
        <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
        <EditRowStyle BackColor="#2461BF" />
        <AlternatingRowStyle BackColor="White" />
    </asp:GridView>
    <br />
    <asp:Button ID="showAdd" runat="server" Text="添 加 记 录" Width="367px" OnClick="showAdd_Click" />
</div>

private void GridViewDataBind()
{
      AreaDAO dao = new AreaDAO();
      gvArea.DataSource = dao.GetAllArea();
      gvArea.DataKeyNames = new string[] { "ID" };
      gvArea.DataBind();
}

protected void gvArea_RowEditing(object sender, GridViewEditEventArgs e)
{
      gvArea.EditIndex = e.NewEditIndex;
      GridViewDataBind();
}

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protected void gvArea_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
     int ID = int.Parse(gvArea.DataKeys[e.RowIndex].Value.ToString());
     string name = ((TextBox)(gvArea.Rows[e.RowIndex].Cells[1].FindControl("txtAreaName"))).Text.ToString().Trim();
     string description = ((TextBox)(gvArea.Rows[e.RowIndex].Cells[2].FindControl("txtAreaDescription"))).Text.ToString().Trim();

AreaDAO dao = new AreaDAO();
      dao.UpdateArea(name, description, ID);

gvArea.EditIndex = -1;
      GridViewDataBind();
}

protected void gvArea_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
       gvArea.EditIndex = -1;
       GridViewDataBind();
}

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protected void gvArea_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
      // 需要添加提示
       int id = Convert.ToInt32(gvArea.DataKeys[e.RowIndex].Value);
      AreaDAO dao = new AreaDAO();
      dao.Delete(id);

GridViewDataBind();
}

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       //添加记录
        protected void btnAdd_Click(object sender, EventArgs e)
        {
            TextBox areaName = gvArea.FooterRow.FindControl("txtName") as TextBox;
            TextBox areaDescription = gvArea.FooterRow.FindControl("txtDescription") as TextBox;

AreaDAO dao = new AreaDAO();
            dao.InsertArea(areaName.Text.Trim(), areaDescription.Text.Trim());
            GridViewDataBind();
        }
        //取消
        protected void btnCancel_Click(object sender, EventArgs e)
        {
            gvArea.ShowFooter = false;
            GridViewDataBind();
        }
        //显示Footer
        protected void showAdd_Click(object sender, EventArgs e)
        {
            gvArea.ShowFooter = true;
            GridViewDataBind();
        }