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未正确分配GridView分页复选框

paging checkbox gridview asp.net c#

hud · 技术社区 · 5 年前

我有数据在我的 gridview 还有一个 pagesize = 2 . 此外,GridView中的每一行都有一个用于批准/拒绝的复选框。

如果我检查了第一页的两行和第二页的两行,它只批准了从第二页检查的最后两页。我不知道为什么会这样。我要所有的4个记录都得到批准。

下面是我写的代码:

阿斯克斯

<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());
    }
}

另请参见分页代码

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());
        }
}

1 回复 | 直到 5 年前

a.bajorinas 5 年前

嗯,我可以想出两种方法来解决这个问题。

将页面上的事件更改为显示/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,您不能访问上一页上的复选框,它们只是“取消模仿”。现在,您可以通过加载整个网格,然后将不在您定义的页面中的项目的可见性设置为不可见来解决这个问题。但这对于庞大的数据来说是非常繁重的,我不推荐这种解决方案。

第二个解决方案是保存复选框状态,比如 ViewState

这样,您应该实现 OnCheckedChanged 用于ChecBox的事件,它将从选中索引的视图状态中添加/删除自身。现在您还必须实现 OnItemDataBound 事件以从视图状态呈现复选框状态。最后一步是在按钮中单击以循环查看状态并对每个项执行逻辑。

<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的情况下编写代码时遗漏了一些错误