本文介绍了算上与分页的GridView的总行数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有分页的GridView。当我尝试计数的GridView一行gridview.rows.count，它给了我只有当前页面的行数。
I have a GridView with paging. When I try to count gridview row with gridview.rows.count, It gives me row count for current page only.
如何获得GridView控件的总行不论页面索引的？
How can I get total rows of GridView irrespective of page index?
//这里是.aspx页面中的code
// Here is the code of .aspx page
<%@ Page Title="Search candidates based on vacancy" Language="C#" MasterPageFile="~/HR Department/hrmasterpage.master"
AutoEventWireup="true" CodeFile="searcAppForVac.aspx.cs" Inherits="HR_Department_searcAppForVac" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server"></asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"> <table width="100%">
<tr>
<td>
</td>
</tr>
<tr>
<td align="center" class="tdtitle">
Search Candidates
</td>
</tr>
<tr>
<td>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table width="100%">
<tr>
<td class="RowHeight" width="20%">
Select Company
</td>
<td width="30%">
<asp:DropDownList ID="companyList" runat="server" AppendDataBoundItems="true" AutoPostBack="True"
OnSelectedIndexChanged="companyList_SelectedIndexChanged" Width="150px">
<asp:ListItem Text="-Select Company-" Value="-1"></asp:ListItem>
</asp:DropDownList>
</td>
<td width="20%">
Select Department
</td>
<td width="30%">
<asp:DropDownList ID="deptList" runat="server" AppendDataBoundItems="true" AutoPostBack="True"
onclick="Validate();" OnSelectedIndexChanged="deptList_SelectedIndexChanged"
Width="150px">
<asp:ListItem Value="-1">-Select Department-</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="RowHeight" width="20%">
Select Vacancy
</td>
<td colspan="3" width="*">
<asp:DropDownList ID="vacanyList" runat="server" AppendDataBoundItems="true"
Width="200px" AutoPostBack="True"
onselectedindexchanged="vacanyList_SelectedIndexChanged">
<asp:ListItem Value="-1">-Select Vacancy-</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td colspan="4" align="center">
<asp:Label ID="notifyLbl" runat="server" Font-Size="Large" ForeColor="Red"
Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td colspan="4">
<asp:Label ID="titleLbl" runat="server" Font-Size="Large" ForeColor="Red"
Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td colspan="4">
<asp:GridView ID="appForVacGrid" runat="server" AutoGenerateColumns="False"
CellPadding="4" ForeColor="#333333" AllowPaging="True"
onpageindexchanging="appForVacGrid_PageIndexChanging" GridLines="None"
PageSize="3">
<RowStyle BackColor="#EFF3FB" />
<Columns>
<asp:TemplateField>
<HeaderTemplate>
App.ID
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="appIdLbl" runat="server" Text='<%# Eval("AppId") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
First Name
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="firstNameLbl" runat="server" Text='<%# Eval("AppFirstName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Last Name
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="lastNameLbl" runat="server" Text='<%# Eval("AppLastName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Qualification
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="qualiNameLbl" runat="server" Text='<%# Eval("QualiName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Experience
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("TotalExpYear") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
EmailId
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="emailLbl" runat="server" Text='<%# Eval("AppEmailId1") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Send Mail
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="sendMailBox" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White"
HorizontalAlign="Right" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center"
VerticalAlign="Top" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White"
Font-Size="Medium" HorizontalAlign="Left" />
<EditRowStyle BackColor="#2461BF" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
</td>
</tr>
<tr>
<td colspan="4" align="center">
</td>
</tr>
<tr>
<td align="center" colspan="4">
<asp:Button ID="sendMailBtn" runat="server" Height="40px" Text="SEND MAIL"
Width="100px" onclick="sendMailBtn_Click" />
</td>
</tr>
<tr>
<%--<td>
</td>--%>
</tr>
</table>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="companyList" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="deptList" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="appForVacGrid" EventName="pageindexchanged" />
</Triggers>
</asp:UpdatePanel>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
</td>
</tr>
</table>
<script type="text/javascript">
function alertOnBadSelection() {
var select = document.getElementById('companyList');
if (select.options[select.selectedIndex].value == "-Select Company-") {
alert('Please Select Company!');
return false;
}
}
</script>
//这是我的aspx.cs页面code
// This is code of my aspx.cs page
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Collections;
public partial class HR_Department_searcAppForVac : System.Web.UI.Page
{
DataOperation oDo = new DataOperation();
AppVacancyDetailClass objAppVacDetail = new AppVacancyDetailClass();
protected void Page_Load(object sender, EventArgs e)
{
notifyLbl.Visible = false;
titleLbl.Visible = false;
sendMailBtn.Visible = false;
try
{
if (!IsPostBack)
{
// Disable department dropdown list and vacancy dropdown list till company is not selected.
deptList.Enabled = false;
vacanyList.Enabled = false;
//Fill Company dropdown list.
DataTable objCmpnyTable = oDo.DropDownList("select * from tblCompanyMaster");
if (objCmpnyTable.Rows.Count > 0)
{
companyList.DataSource = objCmpnyTable;
companyList.DataValueField = "CompId";
companyList.DataTextField = "CompName";
companyList.DataBind();
}
else
{
notifyLbl.Visible = true;
notifyLbl.Text = "There is not any company in the list.";
}
}
else
{
if (companyList.SelectedIndex <= 0)
{
//Disable department dropdown list and vacancy dropdown list till company is not selected.
deptList.Enabled = false;
vacanyList.Enabled = false;
}
}
}
catch (Exception)
{
throw;
}
}
protected void companyList_SelectedIndexChanged(object sender, EventArgs e)
{
//Disable vacancy dropdown list till depratment list is not selected
vacanyList.Enabled = false;
appForVacGrid.DataSource = null;
appForVacGrid.DataBind();
try
{
if (companyList.SelectedIndex > 0)
{
deptList.Enabled = true;
deptList.Items.Clear();
string str = "select * from vwCompWiseList where CompId=" + companyList.SelectedValue;
DataTable objDeptTable = oDo.DropDownList("select DeptId,DeptName from vwCompWiseDept where CompId= "+companyList.SelectedValue);
if (objDeptTable.Rows.Count > 0)
{
deptList.DataSource = objDeptTable;
deptList.DataTextField = "DeptName";
deptList.DataValueField = "deptId";
deptList.DataBind();
deptList.Items.Insert(0, new ListItem("--Select Department--", "-1"));
}
else
{
deptList.Items.Insert(0, new ListItem("--No Departments--", "-1"));
notifyLbl.Visible = true;
notifyLbl.Text = "No Departments Available in " + companyList.SelectedItem.Text;
}
}
else
{
notifyLbl.Visible = true;
notifyLbl.Text = "Select Company....";
appForVacGrid.DataSource = null;
appForVacGrid.DataBind();
}
}
catch (Exception)
{
throw;
}
}
protected void deptList_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
if (deptList.SelectedIndex > 0)
{
vacanyList.Enabled = true;
vacanyList.Items.Clear();
DataTable objVacancytbl = oDo.DropDownList("select VacId,VacTitle from tblVacancyMaster where DeptId =" + deptList.SelectedValue + " and CompId=" + companyList.SelectedValue);
if (objVacancytbl.Rows.Count > 0)
{
vacanyList.DataSource = objVacancytbl;
vacanyList.DataValueField = "VacId";
vacanyList.DataTextField = "VacTitle";
vacanyList.DataBind();
vacanyList.Items.Insert(0, new ListItem("--Select Vacancy--", "-1"));
appForVacGrid.DataSource = null;
appForVacGrid.DataBind();
}
else
{
notifyLbl.Visible = true;
notifyLbl.Text = "ALL VACANCIES ARE CLOSED IN "+" "+deptList.SelectedItem.Text.ToUpper();
vacanyList.Enabled = false;
appForVacGrid.DataSource = null;
appForVacGrid.DataBind();
}
}
else
{
notifyLbl.Visible = true;
notifyLbl.Text = "Select Department...";
appForVacGrid.DataSource = null;
appForVacGrid.DataBind();
vacanyList.Enabled = false;
}
}
catch (Exception)
{
throw;
}
}
protected void vacanyList_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
DataTable AppListTbl = objAppVacDetail.GetValue("CompId=" + companyList.SelectedValue + " and DeptId=" + deptList.SelectedValue + " and VacId=" + vacanyList.SelectedValue);
if (AppListTbl.Rows.Count > 0)
{
appForVacGrid.DataSource = AppListTbl;
appForVacGrid.DataBind();
appForVacGrid.Columns[5].Visible = false;
Session.Add("snAppListTbl", AppListTbl);
titleLbl.Visible = true;
titleLbl.Text = AppListTbl.Rows.Count.ToString() + " " + "CANDIDATE(S) ARE ELIGIBLE FOR THE POST OF" + " " + vacanyList.SelectedItem.Text.ToUpper() + ".";
sendMailBtn.Visible = true;
}
else
{
notifyLbl.Visible = true;
notifyLbl.Text = "ALL VACANCIES ARE CLOSED IN " + " " + deptList.SelectedItem.Text.ToUpper();
appForVacGrid.DataSource = null;
appForVacGrid.DataBind();
}
}
catch (Exception)
{
throw;
}
}
protected void appForVacGrid_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
//DataTable AppListTbl = (DataTable)Session["snAppListTbl"];
titleLbl.Visible = true;
titleLbl.Text = ((DataTable)Session["snAppListTbl"]).Rows.Count.ToString() + " " + "CANDIDATE(S) ARE ELIGIBLE FOR THE POST OF" + " " + vacanyList.SelectedItem.Text.ToUpper() + ".";
appForVacGrid.PageIndex = e.NewPageIndex;
appForVacGrid.DataSource = (DataTable)Session["snAppListTbl"];
appForVacGrid.DataBind();
sendMailBtn.Visible = true;
}
protected void sendMailBtn_Click(object sender, EventArgs e)
{
DataTable AppListTable = ((DataTable)Session["snAppListTbl"]);
int intTotalRows = AppListTable.Rows.Count;
string strFromId="",strToId="",strCcId="",strBccId="";
string strVacTitle="",strCompName="",strMailBody="";
string strSubject = "Rgarding Selection of Your Resume";
Label EmailLbl;
//for (int intRow = 0; intRow < intTotalRows; intRow++)
foreach (GridViewRow Row in appForVacGrid.Rows)
{
CheckBox objSendMail = (CheckBox)Row.FindControl("sendMailBox");
//CheckBox objSendMail = (CheckBox)appForVacGrid.Rows[Row].FindControl("sendMailBox");
if (objSendMail.Checked)
{
if (strToId == "")
{
//strToId = AppListTable.Rows[Row]["AppEmailId1"].ToString();
EmailLbl = (Label)Row.FindControl("emailLbl");
strToId = EmailLbl.Text;
}
else
{
//strToId += "," + AppListTable.Rows[Row]["AppEmailId1"].ToString();
EmailLbl = (Label)Row.FindControl("emailLbl");
strToId +=","+ EmailLbl.Text;
}
}
}
strVacTitle = AppListTable.Rows[intTotalRows]["VacTitle"].ToString();
strCompName = AppListTable.Rows[intTotalRows]["CompName"].ToString();
strMailBody = CommonProcedures.GetMailBody(strVacTitle, strCompName);
//CommonProcedures.SendMail(strFromId, strToId, strCcId, strBccId, strSubject, null, strMailBody, false);
}
}
现在我想将邮件发送到所有的那些候选人复选框被选中..
我TRID这么多的事情，但没有得到任何解决方案
Now I want to send mail to all those candidates whose checkbox is checked..I trid so many things but didnt get any solution
推荐答案
是的，这是真的，它只会只返回当前页面的行。如果你真的想要得到总行数，你需要从你的数据源，而不是得到的。
yes, that's true, it will only return the current page rows only. If you really want to get the total row count, you need to get from your datasource instead.
就像...如果你有数据表，然后它会像...
Like... if you have DataTable then it will be like...
DataTable.Rows.Count
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