【发布时间】：2017-12-13 06:23:05
【问题描述】：
我正在尝试更新 DataList 中的单个记录。我选择了DataList 类型，以便我可以在同一页面上有一个包含许多记录的水平行，可以使用该页面从预先确定的人员列表中获取出席信息，但我想随时更新。我将使用志愿者来参加考勤，并且不想强迫用户在完成后单击保存（他们可能会分心并忘记这样做）。因此，每个复选框都标记了一个人在场。或者取消选中标记它们不存在。
这是我的 CSHTML 页面：
<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="AttendanceTaking.aspx.cs" Inherits="AtChurch.AttendanceTaking" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
<style>.ChkBoxClass input {width:25px; height:25px;}
.auto-style1 {
width: 32px;
}
.auto-style2 {
width: 183px;
}
</style>
<table>
<tr>
<td class="auto-style2"><strong>Take Attendance</strong></td>
<td class="auto-style1">Date:</td>
<td>
<strong>
<asp:Label ID="lblAttendanceDate" runat="server"></asp:Label>
</strong>
</td>
<td>
Attendance Group:</td>
<td>
<strong>
<asp:Label ID="lblAttendanceGroup" runat="server" ></asp:Label>
</strong>
</td>
</tr>
</table>
<p>
<asp:HiddenField ID="HiddenAttendanceDate" runat="server" />
<asp:HiddenField ID="HiddenSoCID" runat="server" />
</p>
<p>
<asp:DataList RepeatDirection="Horizontal" RepeatColumns="6" ID="DataList1" runat="server" DataSourceID="SqlDataSource1" OnSelectedIndexChanged="DataList1_SelectedIndexChanged" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Both">
<FooterStyle BackColor="White" ForeColor="#000066" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
<ItemStyle ForeColor="#000066" />
<ItemTemplate>
<asp:CheckBox ID="CheckBoxPresent" runat="server" RowNumber='<%# Eval("RowNumber") %>' AttendanceID='<%# Eval("AttendanceID") %>' PeopleId='<%# Eval("PeopleID") %>' Text='<%# Eval("CheckBoxPresent") %>' Checked='<%# Eval("CheckBoxPresent").ToString().Equals("1") %>' CssClass="ChkBoxClass" OnCheckedChanged="CheckBoxPresent_CheckedChanged" AutoPostBack="true" />
<asp:Label ID="RowNumber" runat="server" Text='<%# Eval("RowNumber") %>' />
<asp:Label ID="FullName" runat="server" Text='<%# Eval("FullName") %>' />
<asp:Label ID="PeopleID" runat="server" Text='<%# Eval("PeopleID") %>' />
<asp:Label ID="AttendanceID" runat="server" Text='<%# Eval("AttendanceID") %>' ></asp:Label>
<asp:Label ID="AttendLabel" runat="server" Text="      "></asp:Label> <br />
<br />
</ItemTemplate>
<SelectedItemStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<FooterTemplate>
:
</FooterTemplate>
</asp:DataList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:AtChurchConString %>" SelectCommand="sp_AttendanceTaking" SelectCommandType="StoredProcedure">
<SelectParameters>
<asp:ControlParameter ControlID="ChurchID" DefaultValue="0" Name="ChurchID" PropertyName="Value" />
<asp:ControlParameter ControlID="HiddenSoCID" DefaultValue="0" Name="HiddenSoCID" PropertyName="Value" />
<asp:Parameter DefaultValue="1" Name="Select" Type="Int32" />
<asp:ControlParameter ControlID="HiddenAttendanceDate" DefaultValue="" Name="AttendanceDate" PropertyName="Value" Type="DateTime" />
<%--<asp:ControlParameter ControlID="CheckBoxPresent" DefaultValue="0" Name="CheckBoxPresent" PropertyName="Value" />--%>
<%-- <asp:ControlParameter ControlID="AttendanceID" DefaultValue="0" Name="AttendanceID" PropertyName="Value" />--%>
<%--<asp:ControlParameter ControlID="PeopleID" DefaultValue="0" Name="PeopleID" PropertyName="Value" />--%>
</SelectParameters>
</asp:SqlDataSource>
<asp:HiddenField ID="ChurchID" runat="server" />
</p>
<p>
</p>
</asp:Content>
这是我的 CS 页面：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Configuration;
using System.Data.SqlClient;
using System.Data;
using System.Web.SessionState;
namespace AtChurch
{
public partial class AttendanceTaking : System.Web.UI.Page
{
private static string strcon = WebConfigurationManager.ConnectionStrings["AtChurchConString"].ConnectionString;
// Need these for Security
public string strRole, strChurchID, strAttGroup, strAttDate;
public bool ValidUser { get; private set; }
// Checkbox Checked?
protected void CheckBoxPresent_CheckedChanged(object sender, EventArgs e)
{
//start of checkbox
CheckBox ChkBxPresent = sender as CheckBox;
Boolean ChkBxPresentState = ChkBxPresent.Checked;
//DataList1.DataBind();
foreach (DataListItem itm in DataList1.Items)
{
if (itm.ItemType == ListItemType.Item )
{
string strPeopleID = ((Label)itm.FindControl("PeopleID")).Text;
string strAttendanceID = ((Label)itm.FindControl("AttendanceID")).Text;
Response.Write(strPeopleID);
Response.End();
//string strAttID = "";
//strAttID = ((DataBoundLiteralControl)item.Controls[1]).Text;
if (ChkBxPresentState == true)
{
Response.Write("Let's Insert it...");
Response.Write(strPeopleID);
Response.End();
}
else
{
//Response.Write("Let's Remove it...");
//Response.End();
SqlConnection con = new SqlConnection(strcon);
// First let's delete this Groups Data
SqlCommand cmdDelete = new SqlCommand("sp_AttendanceTaking", con);
cmdDelete.CommandType = CommandType.StoredProcedure;
//cmdDelete.Parameters.Add(new SqlParameter("@HiddenSoCID", SqlDbType.Int));
cmdDelete.Parameters.Add(new SqlParameter("@AttendanceID", SqlDbType.Int));
//cmdDelete.Parameters.Add(new SqlParameter("@ChurchID", SqlDbType.Int));
//cmdDelete.Parameters.Add(new SqlParameter("@AttendanceDate", SqlDbType.DateTime));
cmdDelete.Parameters.Add(new SqlParameter("@CheckBoxPresent", SqlDbType.Int));
//cmdDelete.Parameters.Add(new SqlParameter("@PeopleID", SqlDbType.Int));
// Convert Strings to Int where needed
if (Int32.TryParse(strAttendanceID.ToString(), out int intAttendanceID)) { }
Response.Write(intAttendanceID);
Response.Write("-");
Response.Write(1);
Response.End();
cmdDelete.Parameters["@AttendanceID"].Value = intAttendanceID;
cmdDelete.Parameters["@CheckBoxPresent"].Value = 0;
con.Open();
cmdDelete.ExecuteNonQuery();
con.Close();
// End delete data
}
}
}
//end of checkbox
}
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(strcon);
if (!IsPostBack)
{
// Get Attendance Group ID from the Attendance page.
//if (Request.QueryString["SoCID"].ToString() != null && Request.QueryString["SoCID"].ToString() != null)
string SoCID = Server.UrlDecode(Request.QueryString["SoCID"]);
string AttendanceDate = Server.UrlDecode(Request.QueryString["AttendanceDate"]);
// Response.Write("ok?"+AttendanceDate);
// Response.End();
if (SoCID != null && AttendanceDate != null)
{
strAttGroup = SoCID;
HiddenSoCID.Value = strAttGroup;
lblAttendanceGroup.Text = strAttGroup;
strAttDate = AttendanceDate;
HiddenAttendanceDate.Value = strAttDate;
lblAttendanceDate.Text = strAttDate;
//strAttDate = Request.QueryString["AttendanceDate"].ToString();
//Response.Write(strAttGroup);
//Response.Write(strAttDate);
//Response.End();
}
else
{
//Response.Write("error");
Response.Redirect("Attendance.aspx");
Response.End();
}
}
// Security Start
if (Session["Role"] is null && Session["ChurchID"] is null)
{
Response.Redirect("Login.aspx");
return;
}
if (Session["Role"] != null && Session["ChurchID"] != null)
{
if (!string.IsNullOrEmpty(Session["Role"].ToString()))
{
strRole = Session["Role"].ToString();
strChurchID = Session["ChurchID"].ToString();
}
}
if (strRole == ("SuperAdmin") || strRole == ("ChurchAdmin"))
{
ValidUser = true;
}
if (ValidUser != true)
{
Response.Redirect("Login.aspx");
}
// Security End
//Populate the ChurchID for Insert
ChurchID.Value = strChurchID;
}
protected void DataList1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void Button_AttendanceTaker_Command(object sender, CommandEventArgs e)
{
}
}
}
这只是我使用存储过程添加或删除的按钮代码。
protected void CheckBoxPresent_CheckedChanged(object sender, EventArgs e)
{
//start of checkbox
CheckBox ChkBxPresent = sender as CheckBox;
Boolean ChkBxPresentState = ChkBxPresent.Checked;
// I added this to try to compare to to get a specific row for Insert
string BoxIndex = ChkBxPresent.Attributes["RowNumber"];
//DataList1.DataBind();
foreach (DataListItem itm in DataList1.Items)
{
// I added this to try to compare to within the Item List
string ItmIndex = ((Label)itm.FindControl("RowNumber")).Text;
if (itm.ItemType == ListItemType.Item)
{
// Let's gather the parameter data needed
string strPeopleID = ChkBxPresent.Attributes["PeopleId"];
string strAttendanceID = ChkBxPresent.Attributes["AttendanceID"];
string strCheckBoxPresent = ChkBxPresent.Attributes["IsChecked"];
string strAttGroupID = ((Label)itm.FindControl("SoCID")).Text;
string strAttendanceDate = ((Label)itm.FindControl("AttendanceDate")).Text;
// Here is what we do if the box is checked...
// I used this to try and compare the values. It showed the one I wanted to
// compare to but the ItmIndex only returned odd rows. So I don't match somtimes
//Response.Write("BoxIdx=");
//Response.Write(BoxIndex);
//Response.Write("and ItmIdx=");
//Response.Write(ItmIndex);
// I added the compare of ItmIndex == BoxIndex but it was not consistent. Again it was only returning odd
// numbers and no even numbers to compare to for some reason.
if (ChkBxPresentState == true)
{
string strAction = "ADD";
//Response.Write("Add BoxIdx=");
//Response.Write(BoxIndex);
//Response.Write("and ItmIdx=");
//Response.Write(ItmIndex);
SqlConnection con = new SqlConnection(strcon);
//Response.Write("Let's Insert it...");
//Response.Write("PeopleID");
//Response.Write(strPeopleID);
//Response.Write("ChurchID");
//Response.Write(strChurchID);
//Response.Write("GroupID");
//Response.Write(strAttGroupID);
//Response.Write("AttDate");
//Response.Write(strAttendanceDate);
//Response.Write("Action");
//Response.Write(strAction);
//Response.End();
SqlCommand cmdInsertData = new SqlCommand("sp_AttendanceTaking", con);
cmdInsertData.CommandType = CommandType.StoredProcedure;
cmdInsertData.Parameters.Add(new SqlParameter("@AttGroupID", SqlDbType.Int));
cmdInsertData.Parameters.Add(new SqlParameter("@Action", SqlDbType.VarChar));
cmdInsertData.Parameters.Add(new SqlParameter("@PeopleID", SqlDbType.Int));
cmdInsertData.Parameters.Add(new SqlParameter("@ChurchID", SqlDbType.Int));
cmdInsertData.Parameters.Add(new SqlParameter("@AttendanceDate", SqlDbType.DateTime));
// Convert Strings to Int where needed
if (Int32.TryParse(strAttGroupID.ToString(), out int intGroupID)) { }
if (Int32.TryParse(strPeopleID.ToString(), out int intPeopleID)) { }
if (Int32.TryParse(strChurchID.ToString(), out int intChurchID)) { }
//Response.Write(intAttendanceID);
//Response.Write("-");
//Response.Write(strAction);
//Response.End();
cmdInsertData.Parameters["@AttGroupID"].Value = intGroupID;
cmdInsertData.Parameters["@Action"].Value = strAction;
cmdInsertData.Parameters["@PeopleID"].Value = intPeopleID;
cmdInsertData.Parameters["@ChurchID"].Value = intChurchID;
cmdInsertData.Parameters["@AttendanceDate"].Value = strAttendanceDate;
con.Open();
cmdInsertData.ExecuteNonQuery();
con.Close();
}
else
{
string strAction = "DEL";
//Response.Write("DEL BoxIdx=");
//Response.Write(BoxIndex);
//Response.Write("and ItmIdx=");
//Response.Write(ItmIndex);
//Response.Write(" |");
// Here is what we do if the Box is unchecked
//Response.Write("Let's Remove it...");
//Response.Write(strPeopleID);
//Response.Write("aID");
//Response.Write(strAttendanceID);
//Response.Write("checkBoxPresent:");
//Response.Write(strCheckBoxPresent);
//Response.End();
SqlConnection con = new SqlConnection(strcon);
// First let's delete this Groups Data
SqlCommand cmdDelete = new SqlCommand("sp_AttendanceTaking", con);
cmdDelete.CommandType = CommandType.StoredProcedure;
cmdDelete.Parameters.Add(new SqlParameter("@AttendanceID", SqlDbType.Int));
cmdDelete.Parameters.Add(new SqlParameter("@Action", SqlDbType.VarChar));
// Convert Strings to Int where needed
if (Int32.TryParse(strAttendanceID.ToString(), out int intAttendanceID)) { }
//Response.Write(intAttendanceID);
//Response.Write("-");
//Response.Write(strAction);
//Response.End();
cmdDelete.Parameters["@AttendanceID"].Value = intAttendanceID;
cmdDelete.Parameters["@Action"].Value = strAction;
con.Open();
cmdDelete.ExecuteNonQuery();
con.Close();
// End delete data
}
}
}
//end of checkbox
}
这显然不完整，因为我只是想让它显示正确的数据。我对删除部分进行了测试（当未选中该框时），它没有删除特定记录，因为 EventArgs 返回所有复选框值。如果我将其更改为 DataListItemEventArgs 它会返回特定的行，但是我会失去选中复选框的功能。我想我需要将这些分开，但我不确定如何完成这项任务。
这是我想要的功能： 1. 设置日期并检索任何已参加的考勤。
Image of form that loads the AttendanceTaker
还有一个我想要的页面示例，带有一个大复选框，因此可以在平板电脑上使用。
Sample of AttendanceTaker page
我使用所选答案中的想法重写了代码。这是最终工作的代码。
// Checkbox Checked?
protected void CheckBoxPresent_CheckedChanged(object sender, EventArgs e)
{
CheckBox ChkBxPresent = sender as CheckBox;
Boolean ChkBxPresentState = ChkBxPresent.Checked;
if (Int32.TryParse(ChkBxPresent.Attributes["AttendanceID"].ToString(), out int intAttendanceID)) { }
// Let's gather the parameter data needed
string strPeopleID = ChkBxPresent.Attributes["PeopleId"];
string strAttendanceID = ChkBxPresent.Attributes["AttendanceID"];
string strCheckBoxPresent = ChkBxPresent.Attributes["IsChecked"];
string strAttGroupID = ChkBxPresent.Attributes["SoCID"];
string strAttendanceDate = ChkBxPresent.Attributes["AttendanceDate"];
if (intAttendanceID == 0) // Add Attendance Record it does not exist and was checked
{
string strAction = "ADD";
SqlConnection con = new SqlConnection(strcon);
SqlCommand cmdInsertData = new SqlCommand("sp_AttendanceTaking", con);
cmdInsertData.CommandType = CommandType.StoredProcedure;
cmdInsertData.Parameters.Add(new SqlParameter("@AttGroupID", SqlDbType.Int));
cmdInsertData.Parameters.Add(new SqlParameter("@Action", SqlDbType.VarChar));
cmdInsertData.Parameters.Add(new SqlParameter("@PeopleID", SqlDbType.Int));
cmdInsertData.Parameters.Add(new SqlParameter("@ChurchID", SqlDbType.Int));
cmdInsertData.Parameters.Add(new SqlParameter("@AttendanceDate", SqlDbType.DateTime));
// Convert Strings to Int where needed
if (Int32.TryParse(strAttGroupID.ToString(), out int intGroupID)) { }
if (Int32.TryParse(strPeopleID.ToString(), out int intPeopleID)) { }
if (Int32.TryParse(strChurchID.ToString(), out int intChurchID)) { }
cmdInsertData.Parameters["@AttGroupID"].Value = intGroupID;
cmdInsertData.Parameters["@Action"].Value = strAction;
cmdInsertData.Parameters["@PeopleID"].Value = intPeopleID;
cmdInsertData.Parameters["@ChurchID"].Value = intChurchID;
cmdInsertData.Parameters["@AttendanceDate"].Value = strAttendanceDate;
con.Open();
cmdInsertData.ExecuteNonQuery();
con.Close();
DataList1.DataBind();
}
else // Delete Attendance Record it was unchecked
{
string strAction = "DEL";
SqlConnection con = new SqlConnection(strcon);
// First let's delete this Groups Data
SqlCommand cmdDelete = new SqlCommand("sp_AttendanceTaking", con);
cmdDelete.CommandType = CommandType.StoredProcedure;
cmdDelete.Parameters.Add(new SqlParameter("@AttendanceID", SqlDbType.Int));
cmdDelete.Parameters.Add(new SqlParameter("@Action", SqlDbType.VarChar));
cmdDelete.Parameters["@AttendanceID"].Value = intAttendanceID;
cmdDelete.Parameters["@Action"].Value = strAction;
con.Open();
cmdDelete.ExecuteNonQuery();
con.Close();
DataList1.DataBind();
// End delete data
}
////end of checkbox
【问题讨论】：