Question

我的gridview和pagesize = 2中都有数据。此外，gridview中的每一行都有一个复选框，用于批准/拒绝。

如果我从第一页检查了2行，从第二页检查了2行，则它仅批准从第二页检查的最后两页。我不知道为什么会这样。我希望所有4条记录都得到批准。

下面是我写的代码：

ASPX

<asp:GridView ID="grdDisplayCMMData" runat="server" 
     AutoGenerateColumns="false" Width="100%" ShowHeaderWhenEmpty="true" 
     CssClass="heavyTable table" EmptyDataText="No records to display"
     AllowPaging="true" PageSize="2" 
     OnPageIndexChanging="grdDisplayCMMData_PageIndexChanging">
    <Columns>                    
                <asp:TemplateField HeaderText="ID" Visible="false">
                    <ItemTemplate>
                        <asp:Label ID="lblID_CMM" runat="server" Text='<%#Eval("ID") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="SAP ID">
                    <ItemTemplate>
                        <asp:Label ID="lblSAP_ID_CMM" runat="server" Text='<%#Eval("SAP_ID") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="ID OD CHANGE">
                    <ItemTemplate>
                        <asp:Label ID="lblID_OD_COUNTCHANGE_CMM" runat="server" Text='<%#Eval("ID_OD_COUNTCHANGE") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="ID OD CHANGE DATE">
                    <ItemTemplate>
                        <asp:Label ID="lblID_OD_CHANGEDDATE_CMM" runat="server" Text='<%#Eval("ID_OD_CHANGEDDATE") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="RRH COUNT CHANGE">
                    <ItemTemplate>
                        <asp:Label ID="lblRRH_COUNTCHANGE_CMM" runat="server" Text='<%#Eval("RRH_COUNTCHANGE") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="RRH COUNT CHANGE DATE">
                    <ItemTemplate>
                        <asp:Label ID="lblRRH_CHANGEDDATE_CMM" runat="server" Text='<%#Eval("RRH_CHANGEDDATE") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="TENANCY COUNT CHANGE">
                    <ItemTemplate>
                        <asp:Label ID="lblTENANCY_COUNTCHANGE_CMM" runat="server" Text='<%#Eval("TENANCY_COUNTCHANGE") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="TENANCY COUNT CHANGE DATE">
                    <ItemTemplate>
                        <asp:Label ID="lblTENANCY_CHANGEDDATE_CMM" runat="server" Text='<%#Eval("TENANCY_CHANGEDDATE") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="STATUS">
                    <ItemTemplate>
                        <asp:Label ID="lblSTATUS_CMM" runat="server" Text='<%#Eval("STATUS") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="CREATED BY" Visible="false">
                    <ItemTemplate>
                        <asp:Label ID="lblCREATEDBY_CMM" runat="server" Text='<%#Eval("CREATED_BY") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Approve/Reject">
                    <ItemTemplate>
                        <asp:CheckBox ID="chkApprRejCMM" runat="server" />
                    </ItemTemplate>
                </asp:TemplateField>
    </Columns>                
</asp:GridView>

C＃代码：

protected void btnApproveCMM_Click(object sender, EventArgs e)
{
    try
    {
            bool flgCMM = false;
            IPColoFields ObjIPColoFields = new App_Code.IPColoFields();
            List<IPColoBilling_BKP.App_Code.UMS.UMSGroupDetails> UMSGroupDetails = (List<IPColoBilling_BKP.App_Code.UMS.UMSGroupDetails>)Session["lstUMSGroupDetails"];

            Session["lstUMSGroupDetails"] = UMSGroupDetails;
            string strApprove = "";

            foreach (GridViewRow gvrow in grdDisplayCMMData.Rows)
            {
                var checkbox = gvrow.FindControl("chkApprRejCMM") as CheckBox;

                if (checkbox.Checked)
                {
                    flgCMM = true;

                    int Id = Convert.ToInt32((grdDisplayCMMData.Rows[gvrow.RowIndex].FindControl("lblID_CMM") as Label).Text);

                    ObjIPColoFields.Unique_Id = Id;
                    ObjIPColoFields.UMS_GRP_BY_ID = intCurrentGrpId;
                    ObjIPColoFields.UMS_GRP_BY_NAME = strCurrentGrp;
                    ObjIPColoFields.UMS_GRP_TO_ID = UMSGroupDetails[1].GroupID;
                    ObjIPColoFields.UMS_GRP_TO_NAME = UMSGroupDetails[1].GroupName;
                    ObjIPColoFields.FCA_STATUS = "1";
                    ObjIPColoFields.LAST_UPDATED_BY = lblUserName.Text;
                    strApprove = CommonDB.Approve_IPCOLO_CMMLevel(ObjIPColoFields);
                }
            }

            BindCMMData();
            if (flgCMM == false)
            {
                ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Please check atleast one row'); window.location ='IpColoDefault.aspx';", true);
            }
            else
            {
                ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Record Approved successfully'); window.location ='IpColoDefault.aspx';", true);

            }

    }
    catch (Exception ex)
    {
        string strErrorMsg = ex.Message.ToString() + " " + "StackTrace :" + ex.StackTrace.ToString();
        CommonDB.WriteLog("ERROR:" + strErrorMsg, ConfigurationManager.AppSettings["IPCOLO_LOG"].ToString());
    }
}

另请参阅分页代码

protected void grdDisplayCMMData_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
        try
        {
            BindCMMData();
            grdDisplayCMMData.PageIndex = e.NewPageIndex;
            grdDisplayCMMData.DataBind();
        }
        catch (Exception ex)
        {
            string strErrorMsg = ex.Message.ToString() + " " + "StackTrace :" + ex.StackTrace.ToString();
            CommonDB.WriteLog("ERROR:" + strErrorMsg, ConfigurationManager.AppSettings["IPCOLO_LOG"].ToString());
        }
}

Answer 1

好吧，我可以想到两种方法来解决问题。

更改页面事件以显示/隐藏项目。

默认的网格视图分页事件触发回发并重新绑定网格，因此，您无法访问上一页的复选框，它们只是“消失”。现在，您可以解决此问题，方法是加载整个网格，然后将不在您定义的页面范围内的项目的可见性设置为不可见。但这对于海量数据变得非常繁重，因此我不推荐这种解决方案。

第二种解决方案是保存复选框状态，用ViewState

这样，您应该为自己的checbox实现一个OnCheckedChanged事件，该事件将在已检查索引的视图状态中添加/删除自身。现在，您还必须实现一个OnItemDataBound事件，以从viewstate呈现复选框状态。最后一步是单击按钮以遍历视图状态并在每个项目上执行逻辑。

<asp:GridView ID="grdDisplayCMMData" runat="server" 
    AutoGenerateColumns="false" Width="100%" ShowHeaderWhenEmpty="true" 
    CssClass="heavyTable table" EmptyDataText="No records to display"
    AllowPaging="true" PageSize="2" 
    OnPageIndexChanging="grdDisplayCMMData_PageIndexChanging">
    OnItemDataBound="grdDisplayCMMData_OnItemDataBound"
    <Columns>
        <asp:TemplateField HeaderText="Approve/Reject">
            <ItemTemplate>
                <asp:CheckBox ID="chkApprRejCMM" runat="server" OnCheckedChange="chkApprRejCMM_OnCheckedChanged" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

protected void chkApprRejCMM_OnCheckedChanged(object sender, EventArgs e)
{
    if(ViewState["CheckedCheckboxes"] != null)
    {
        var CheckedCheckboxes = (List<int>)ViewState["CheckedCheckboxes"];
        var checkbox = (CheckBox)sender;
        var idLabel = (TextBox)checkbox.BindingContainer.FindControl("lblID_CMM");
        if(idLabel != null && !string.IsNullOrEmpty(idLabel.Text))
        {
            if(checkbox.Checked)
            {
                if(!CheckedCheckboxes.Contains(Convert.ToInt32(idLabel.Text)))
                    CheckedCheckboxes.Add(Convert.ToInt32(idLabel.Text));
           }
            else
            {
                if(CheckedCheckboxes.Contains(Convert.ToInt32(idLabel.Text)))
                    CheckedCheckboxes.Remove(Convert.ToInt32(idLabel.Text))
            }
        }
        ViewState["CheckedCheckboxes"] = CheckedCheckboxes; 
    }
}

protected void grdDisplayCMMData_OnItemDataBound(object sender, GridViewEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    { 
        if(ViewState["CheckedCheckboxes"] != null)
        {
            var CheckedCheckboxes = (List<int>)ViewState["CheckedCheckboxes"];
            var checkbox = (CheckBox)e.Row.FindControl("lchkApprRejCMM");
            var idLabel = (TextBox)e.Row.FindControl("lblID_CMM");
            if(idLabel != null && checkbox != null && !string.IsNullOrEmpty(idLabel.Text))
            {
                   if(CheckedCheckboxes.Contains(Convert.ToInt32(idLabel.Text)))
                    checbox.Checked = true;
                else
                    checbox.Checked = false;
            }
        }
    }
}

protected void YourButtonClick(object sender, EventArgs e)
{
    if(ViewState["CheckedCheckboxes"] != null)
    {
        var CheckedCheckboxes = (List<int>)ViewState["CheckedCheckboxes"];
        foreach (var id in CheckedCheckboxes)
        {
           //perform logic with id
        }
    }
}

编辑1：我在不使用IDE的情况下编写代码遗漏了一些错误

Gridview分页复选框未正确分配

1 个答案: