检查列和绑定网格（如果存在或不存在）

时间：2013-05-03 09:00:12

标签： c# asp.net

如何在itemtemplate事件中将数据绑定到gridview的{​​{1}}。我正在使用gridview，下面是该网格视图的代码。

RowDataBound

在此，我想删除<asp:GridView ID="gvCoreUtilization" runat="server" BackColor="White" BorderColor="#cEcFcE" BorderStyle="Solid" BorderWidth="1px" CellPadding="4" ForeColor="Black" OnRowCreated="grdPivot3_RowCreated" AutoGenerateColumns="false" OnRowDataBound="grdCoreUtilization_RowDataBound"> <RowStyle BackColor="#F7F7DE" /> <FooterStyle BackColor="#CCCC99" /> <PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" /> <SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" /> <HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" HorizontalAlign="Left" /> <AlternatingRowStyle BackColor="White" /> <Columns> <asp:TemplateField> <ItemTemplate> <asp:Label ID="lblRoleID" Text='<%#Eval("RoleId") %>' runat="server" Visible="false"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> SupervisorName </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblSupervisorName" Text='<%#Eval("SupervisorName") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> UserECode </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblUserECode" Text='<%#Eval("UserECode") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> UserName </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblUserName" Text='<%#Eval("UserName") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> Designation </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblDesignation" Text='<%#Eval("Designation") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> L & D Training% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblLDTraining" Text='<%#Eval("L & D Training%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> Non Production% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblNonProduction" Text='<%#Eval("Non Production%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> Process Support% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblProcessSupport" Text='<%#Eval("Process Support%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> Process Training% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblProcessTraining" Text='<%#Eval("Process Training%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> Production% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblProduction" Text='<%#Eval("Production%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> System Downtime% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblSystemDowntime" Text='<%#Eval("System Downtime%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <HeaderTemplate> Grand Total% </HeaderTemplate> <ItemTemplate> <asp:Label ID="lblGrandTotal" Text='<%#Eval("Grand Total%") %>' runat="server"></asp:Label> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> 以将数据绑定到EVAl。取而代之的是我想查看天气

  1. 如果Gridview中提到的itemtemplate / dataset中是否存在所有列。
  2. 如果所有列都存在，则将该列绑定到适当的Itemtemplate。
  3. 如果所有列都不存在，则显示并仅绑定可用列并隐藏不可用列。

    4. 使用的查询： - 

    Datatable

    执行上述查询后，我正在对c＃中的Activity列进行一个数据透视，这些列是“L＆amp; D Training％”，“Non Production％”，“Process Support％”，“Process Training％”，我在ItemTemplate上绑定的“生产％”，“系统停机时间百分比”，“总计百分比”。

3 个答案:

答案 0 :(得分：0)

 if (e.Row.RowType == DataControlRowType.DataRow)
        {
            System.Web.UI.WebControls.Label lblRoleNo = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblRoleId");
            System.Web.UI.WebControls.Label lblSupervisorName = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblSupervisorName");
            System.Web.UI.WebControls.Label lblUserECode = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblUserECode");
            System.Web.UI.WebControls.Label lblUserName = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblUserName");
            System.Web.UI.WebControls.Label lblDesignation = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblDesignation");
            System.Web.UI.WebControls.Label lblLDTraining = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblLDTraining");
            System.Web.UI.WebControls.Label lblNonProduction = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblNonProduction");
            System.Web.UI.WebControls.Label lblProcessSupport = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblProcessSupport");
            System.Web.UI.WebControls.Label lblProcessTraining = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblProcessTraining");
            System.Web.UI.WebControls.Label lblProduction = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblProduction");
            System.Web.UI.WebControls.Label lblSystemDowntime = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblSystemDowntime");
            System.Web.UI.WebControls.Label lblGrandTotal = (System.Web.UI.WebControls.Label)e.Row.FindControl("lblGrandTotal");

            //Checking weather Columns exist in the Pivot or not

            var dataRow = (DataRowView)e.Row.DataItem;
            var columnNameToCheck = "L & D Training%";
            var checkTraining = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNameToCheck, StringComparison.InvariantCultureIgnoreCase));
            if (checkTraining)
            {
                // Property available
                lblLDTraining.Text = (DataBinder.Eval(e.Row.DataItem, "L & D Training%")).ToString();
            }
            else
            {
                lblLDTraining.Visible = false;
            }


            var columnNonProduction = "Non Production%";
            var checkNonProduction = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNonProduction, StringComparison.InvariantCultureIgnoreCase));
            if (checkNonProduction)
            {
                // Property available
                lblNonProduction.Text = (DataBinder.Eval(e.Row.DataItem, "Non Production%")).ToString();
            }
            else
            {
                lblNonProduction.Visible = false;
            }

            var columnProcessSupport = "Process Support%";
            var checkProcessSupport = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnProcessSupport, StringComparison.InvariantCultureIgnoreCase));
            if (checkProcessSupport)
            {
                // Property available
                lblProcessSupport.Text = (DataBinder.Eval(e.Row.DataItem, "Process Support%")).ToString();
            }
            else
            {
                lblProcessSupport.Visible = false;
            }

            var columnProcessTraining = "Process Training%";
            var checkProcesstraining = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnProcessTraining, StringComparison.InvariantCultureIgnoreCase));
            if (checkProcesstraining)
            {
                // Property available
                lblProcessTraining.Text = (DataBinder.Eval(e.Row.DataItem, "Process Training%")).ToString();
            }
            else
            {
                lblProcessTraining.Visible = false;
            }

            var columnProduction = "Production%";
            var checkProduction = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnProduction, StringComparison.InvariantCultureIgnoreCase));
            if (checkProduction)
            {
                // Property available
                lblProduction.Text = (DataBinder.Eval(e.Row.DataItem, "Production%")).ToString();
            }
            else
            {
                lblProduction.Visible = false;
            }


            var columnSystemDownTime = "System Downtime%";
            var checkSystemDownTime = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnSystemDownTime, StringComparison.InvariantCultureIgnoreCase));
            if (checkSystemDownTime)
            {
                // Property available
                lblSystemDowntime.Text = (DataBinder.Eval(e.Row.DataItem, "System Downtime%")).ToString();
            }
            else
            {
                lblSystemDowntime.Visible = false;
            }

            var columnGrandTotal = "Grand Total%";
            var checkGrandTotal = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnGrandTotal, StringComparison.InvariantCultureIgnoreCase));
            if (checkGrandTotal)
            {
                // Property available
                lblGrandTotal.Text = (DataBinder.Eval(e.Row.DataItem, "Grand Total%")).ToString();
            }
            else
            {
                lblGrandTotal.Visible = false;
            }



            var columnNameToCheckRoleID = "RoleId";
            var checkRoleID = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNameToCheckRoleID, StringComparison.InvariantCultureIgnoreCase));
            if (checkRoleID)
            {
                // Property available
                lblRoleNo.Text = (DataBinder.Eval(e.Row.DataItem, "RoleId")).ToString();
            }
            else
            {
                lblRoleNo.Visible = false;
            }

            var columnNameToCheckSupervisorName = "SupervisorName";
            var checkSupervisorName = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNameToCheckSupervisorName, StringComparison.InvariantCultureIgnoreCase));
            if (checkSupervisorName)
            {
                // Property available
                lblSupervisorName.Text = (DataBinder.Eval(e.Row.DataItem, "SupervisorName")).ToString();
            }
            else
            {
                lblSupervisorName.Visible = false;
            }


            var columnNameToCheckUserECode = "UserECode";
            var checkUserECode = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNameToCheckUserECode, StringComparison.InvariantCultureIgnoreCase));
            if (checkUserECode)
            {
                // Property available
                lblUserECode.Text = (DataBinder.Eval(e.Row.DataItem, "UserECode")).ToString();
            }
            else
            {
                lblUserECode.Visible = false;
            }

            var columnNameToCheckUserName = "UserName";
            var checkUserName = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNameToCheckUserName, StringComparison.InvariantCultureIgnoreCase));
            if (checkUserName)
            {
                // Property available
                lblUserName.Text = (DataBinder.Eval(e.Row.DataItem, "UserName")).ToString();
            }
            else
            {
                lblUserName.Visible = false;
            }

            var columnNameToCheckDesignation = "Designation";
            var checkDesignation = dataRow.Row.Table.Columns.Cast<DataColumn>().Any(x => x.ColumnName.Equals(columnNameToCheckDesignation, StringComparison.InvariantCultureIgnoreCase));
            if (checkDesignation)
            {
                // Property available
                lblDesignation.Text = (DataBinder.Eval(e.Row.DataItem, "Designation")).ToString();
            }
            else
            {
                lblDesignation.Visible = false;
            }


            //Changing color of the Pivot Data

            if (Convert.ToInt32(lblRoleNo.Text.ToString()) == 2)
            {
                e.Row.BackColor = System.Drawing.Color.GreenYellow;
            }
            if (Convert.ToInt32(lblRoleNo.Text.ToString()) == 3)
            {
                e.Row.BackColor = System.Drawing.Color.Cyan;
            }
            if (Convert.ToInt32(lblRoleNo.Text.ToString()) == 4)
            {
                e.Row.BackColor = System.Drawing.Color.Orange;
            }
            if (Convert.ToInt32(lblRoleNo.Text.ToString()) == 5)
            {
                e.Row.BackColor = System.Drawing.Color.Pink;
            }






        }

答案 1 :(得分：0)

在每个模板字段中尝试此操作。 将可见属性设置如下...... Visible ='＆lt;％＃！String.IsNullOrEmpty（Eval（“RoleId”）。ToString（））％＆gt;'

答案 2 :(得分：-1)

如果值为空，此代码可让您隐藏代码后面的特定单元格... 

Protected Sub gvCoreUtilization_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvCoreUtilization.RowDataBound
        Try
            If e.Row.RowType = DataControlRowType.DataRow Then

                Dim olblRoleID As New Label
                Dim olblSupervisorName As New Label
                Dim olblUserECode As New Label
                Dim olblUserName As New Label
                Dim olblDesignation As New Label
                Dim olblLDTraining As New Label
                Dim olblNonProduction As New Label
                Dim olblProcessSupport As New Label
                Dim olblProcessTraining As New Label
                Dim olblProduction As New Label
                Dim olblSystemDowntime As New Label
                Dim olblGrandTotal As New Label

                olblRoleID = CType(e.Row.FindControl("lblRoleID"), Label)
                olblSupervisorName = CType(e.Row.FindControl("lblSupervisorName"), Label)
                olblUserECode = CType(e.Row.FindControl("lblUserECode"), Label)
                olblUserName = CType(e.Row.FindControl("lblUserName"), Label)
                olblDesignation = CType(e.Row.FindControl("lblDesignation"), Label)
                olblLDTraining = CType(e.Row.FindControl("lblLDTraining"), Label)
                olblNonProduction = CType(e.Row.FindControl("lblNonProduction"), Label)
                olblProcessSupport = CType(e.Row.FindControl("lblProcessSupport"), Label)
                olblProcessTraining = CType(e.Row.FindControl("lblProcessTraining"), Label)
                olblProduction = CType(e.Row.FindControl("lblProduction"), Label)
                olblSystemDowntime = CType(e.Row.FindControl("lblSystemDowntime"), Label)
                olblGrandTotal = CType(e.Row.FindControl("lblGrandTotal"), Label)


                If CType(DataBinder.Eval(e.Row.DataItem, "RoleId"), String) = "" Then
                    olblRoleID.Visible = False
                Else
                    olblRoleID.Text = DataBinder.Eval(e.Row.DataItem, "RoleId")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "SupervisorName"), String) = "" Then
                    olblSupervisorName.Visible = False
                Else
                    olblSupervisorName.Text = DataBinder.Eval(e.Row.DataItem, "SupervisorName")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "UserECode"), String) = "" Then
                    olblUserECode.Visible = False
                Else
                    olblUserECode.Text = DataBinder.Eval(e.Row.DataItem, "UserECode")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "UserName"), String) = "" Then
                    olblUserName.Visible = False
                Else
                    olblUserName.Text = DataBinder.Eval(e.Row.DataItem, "UserName")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "Designation"), String) = "" Then
                    olblDesignation.Visible = False
                Else
                    olblDesignation.Text = DataBinder.Eval(e.Row.DataItem, "Designation")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "L & D Training"), String) = "" Then
                    olblLDTraining.Visible = False
                Else
                    olblLDTraining.Text = DataBinder.Eval(e.Row.DataItem, "L & D Training")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "Non Production"), String) = "" Then
                    olblNonProduction.Visible = False
                Else
                    olblNonProduction.Text = DataBinder.Eval(e.Row.DataItem, "Non Production")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "Process Support"), String) = "" Then
                    olblProcessSupport.Visible = False
                Else
                    olblProcessSupport.Text = DataBinder.Eval(e.Row.DataItem, "Process Support")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "Process Training"), String) = "" Then
                    olblProcessTraining.Visible = False
                Else
                    olblProcessTraining.Text = DataBinder.Eval(e.Row.DataItem, "Process Training")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "Production"), String) = "" Then
                    olblProduction.Visible = False
                Else
                    olblProduction.Text = DataBinder.Eval(e.Row.DataItem, "Production")
                End If


                If CType(DataBinder.Eval(e.Row.DataItem, "System Downtime"), String) = "" Then
                    olblSystemDowntime.Visible = False
                Else
                    olblSystemDowntime.Text = DataBinder.Eval(e.Row.DataItem, "System Downtime")
                End If

                If CType(DataBinder.Eval(e.Row.DataItem, "Grand Total"), String) = "" Then
                    olblGrandTotal.Visible = False
                Else
                    olblGrandTotal.Text = DataBinder.Eval(e.Row.DataItem, "Grand Total")
                End If

            End If
        Catch ex As Exception
            General.LogException(ex)
        End Try
    End Sub

如果您想隐藏网格中的整个列，请按照以下步骤进行操作

1）在页面上为每个列创建视图状态属性

 Property RoleId() As boolen
        Get
            If IsNothing(Me.ViewState("RoleId")) Then Me.ViewState("RoleId") = false
            Return CType(Me.ViewState("RoleId"), Boolean)
        End Get
        Set(ByVal value As Boolean)
            Me.ViewState("RoleId") = value
        End Set
    End Property

2）循环抛出每行的每一列的数据集并检查值是否存在并设置此属性，最后您具有值为true或false的属性，并且您可以找到需要在网格中显示的列。

3）然后你可以轻松隐藏网格列。

if Me.RoleId= True then
'Write code to Display
else
'Write code to Hide
end if
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