Question

我正在从下拉列表中选择值来过滤gridview。问题是，当我选择任何值时，它会给我正确的结果，但是当我选择默认值意味着Select the value时，gridview仍会将错误视为No Records Found。

我尝试为此实现更新面板，以便可以通过它进行处理。但我面临如下错误：

无法在关联控件'grdCSRPageData'上找到名为'Click'的事件，因为UpdatePanel的“updgridPage”中的触发器。

请在更新面板中查看我的代码： -

 <asp:UpdatePanel ID="updgridPage" runat="server" UpdateMode="Conditional">
            <ContentTemplate>
                <asp:GridView ID="grdCSRPageData" runat="server" Width="100%" border="1" Style="border: 1px solid #E5E5E5;" CellPadding="3"
                    AutoGenerateColumns="False" OnDataBound="grdCSRPageData_DataBound" AllowPaging="true" CssClass="hoverTable" EmptyDataText="No Records Found"
                    OnPageIndexChanging="grdCSRPageData_PageIndexChanging" DataKeyNames="Id" OnRowDeleting="grdCSRPageData_RowDeleting"
                    PageSize="5" ShowFooter="true" OnRowEditing="grdCSRPageData_RowEditing" OnRowUpdating="grdCSRPageData_RowUpdating"
                    OnRowCancelingEdit="grdCSRPageData_RowCancelingEdit">
                    <AlternatingRowStyle CssClass="k-alt" BackColor="#f5f5f5" />
                    <Columns>
                        <asp:TemplateField HeaderText="Select" HeaderStyle-Width="5%" HeaderStyle-CssClass="k-grid td">
                            <ItemTemplate>
                                <asp:CheckBox ID="chkSelect" runat="server" AutoPostBack="false" />
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:BoundField DataField="page_title" HeaderText="Page Title" ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td" />
                        <asp:BoundField DataField="page_description" HeaderText="Page Description" ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td" />
                        <asp:BoundField DataField="meta_title" HeaderText="Meta Title" ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td" />
                        <asp:BoundField DataField="meta_keywords" HeaderText="Meta Keywords" ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td" />
                        <asp:BoundField DataField="meta_description" HeaderText="Meta Description" ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td" />
                        <asp:BoundField DataField="Active" HeaderText="Active" ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td" />
                        <asp:TemplateField HeaderText="Action" HeaderStyle-Width="15%" HeaderStyle-CssClass="k-grid td">
                            <ItemTemplate>
                                <asp:ImageButton ID="btnDelete" AlternateText="Delete" ImageUrl="~/images/delete.png" runat="server" Width="15" Height="15" CommandName="Delete" CommandArgument='<%# Eval("Id") %>' CausesValidation="false" OnClientClick="return confirm('Are you sure you want to delete this record?')" />
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:CommandField ButtonType="Image" ItemStyle-Width="15" EditImageUrl="~/images/edit.png" ShowEditButton="True" ControlStyle-Width="15" ControlStyle-Height="15" CancelImageUrl="~/images/close.png" UpdateImageUrl="~/images/update.png">
                            <ControlStyle Height="20px" Width="20px"></ControlStyle>
                        </asp:CommandField>
                    </Columns>
                </asp:GridView>
            </ContentTemplate>
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="grdCSRPageData" EventName="Click" />
            </Triggers>
        </asp:UpdatePanel>

让我知道我必须做出哪些改变。

网格视图的过滤代码： -

<asp:DropDownList ID="ddlPagesNgo" runat="server" CssClass="selectpicker form-control-drp wd" Style="width: 100%" AutoPostBack="true" OnSelectedIndexChanged="ddlPagesNgo_SelectedIndexChanged"></asp:DropDownList>

SelectedIndexChangedCode： -

 protected void ddlPagesNgo_SelectedIndexChanged(object sender, EventArgs e)
    {
        BindGridView(ddlPagesNgo.SelectedValue);
    }

BindGridView代码： -

public void BindGridView(string NgoId)
    {
        string strQuery = "select Id,page_title,page_description,meta_title,meta_keywords,meta_description,Active from tbl_Pages WHERE NgoId=" + NgoId + " ORDER By Id DESC";
        SqlCommand cmd = new SqlCommand(strQuery);
        DataTable dt = GetData(cmd);
        grdCSRPageData.DataSource = dt;
        grdCSRPageData.DataBind(); 
    }

如果您还有其他需要，请告诉我

Answer 1

使用此代码。你的错误是单击EventName错误

<Triggers>
   <asp:AsyncPostBackTrigger ControlID="grdCSRPageData" EventName="PageIndexChanging" />
</Triggers>

Answer 2

通过将if else条件

完成

 public void BindGridView(string NgoId)
    {
        string strQuery = null;

        if (NgoId != "0")
            strQuery = "select Id,page_title,page_description,meta_title,meta_keywords,meta_description,Active from tbl_Pages WHERE NgoId=" + NgoId + " ORDER By Id DESC";
        else
            strQuery = "select Id,page_title,page_description,meta_title,meta_keywords,meta_description,Active from tbl_Pages ORDER By Id DESC";

        SqlCommand cmd = new SqlCommand(strQuery);
        DataTable dt = GetData(cmd);
        grdCSRPageData.DataSource = dt;
        grdCSRPageData.DataBind(); 
    }

更新面板触发错误

2 个答案: