我正在设计一个工资系统使用access数据库作为后端。
目前,我在实现“打卡”功能时遇到了问题。
“打卡”按钮在数据库中插入时间。但是,当单击“退出时钟”按钮时,它会将数据插入到新行中。是否有任何方法可以避免这种情况,并考虑到员工姓名来更新现有的最后一行。我尝试过用不同的方法来解决这个问题,但到目前为止我还没能解决这个问题。
有没有办法纠正这一点?
我想我必须在某个地方实现一个循环来检查emp名称,打卡,并在时钟输出字段中定位空值。不过,我不确定。
请给我建议。
我的代码如下;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class timecards : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
{
if (Session["ID"] != null && Session["ID"].ToString() != "")
{
PanelUsersInfo.Visible = true;
}
else
{
PanelUsersInfo.Visible = false;
}
empLabel.Visible = false;
mainPagebutton.Visible = false;
logoutButton.Visible = false;
if (Session["Title"] == null || Session["Names"] == null)
{
clockPanel.Visible = false;
return;
}
else
{
mainPagebutton.Visible = true;
logoutButton.Visible = true;
empLabel.Visible = true;
empLabel.Text = "<b>Hi, " + Session["Names"].ToString() + "</b>";
nameLabel.Text = Session["Names"].ToString();
clockinLabel.Text = DateTime.Now.ToString("HH:mm");
Label1.Text = clockinLabel.Text;
}
}
}
protected void mainPage_Click(object sender, EventArgs e)
{
Response.Redirect("employeeLoggedin.aspx");
}
protected void logout_Click(object sender, EventArgs e)
{
Session.Abandon();
Response.Redirect("default.aspx");
}
protected void clockinButton_Click(object sender, EventArgs e)
{
informLabel.Text = "Clocked in at " + Label1.Text + "";
Label1.Visible = false;
Label2.Visible = false;
clockinButton.Enabled = false;
clockoutButton.Enabled = true;
string connectionString = "provider=Microsoft.Jet.OLEDB.4.0;" + "data source=" + Page.Server.MapPath("App_Data\\database.mdb");
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(connectionString);
System.Data.OleDb.OleDbCommand cmd = conn.CreateCommand();
cmd.Parameters.Add("Employee", System.Data.OleDb.OleDbType.VarChar);
cmd.Parameters["Employee"].Value = nameLabel.Text;
cmd.Parameters.Add("Clockin", System.Data.OleDb.OleDbType.VarChar);
cmd.Parameters["Clockin"].Value = clockinLabel.Text;
cmd.CommandText = "INSERT INTO [timecard] ([Employee], [Clockin]) VALUES (@Employee, @Clockin)";
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
protected void clockoutButton_Click(object sender, EventArgs e)
{
clockoutLabel.Visible = true;
clockoutLabel.Text = "You have now been clocked out.";
informLabel.Visible = false;
Label1.Visible = false;
clockoutButton.Enabled = false;
infoLabel.Visible = true;
infoLabel.Text = "If you want to clock in again, please select timecard option from the main employee page.";
string connectionString = "provider=Microsoft.Jet.OLEDB.4.0;" + "data source=" + Page.Server.MapPath("App_Data\\database.mdb");
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(connectionString);
System.Data.OleDb.OleDbCommand cmd = conn.CreateCommand();
cmd.Parameters.Add("Employee", System.Data.OleDb.OleDbType.VarChar);
cmd.Parameters["Employee"].Value = this.nameLabel.Text;
//String x = DateTime.Now.ToString("HH:mm");
cmd.Parameters.Add("Clockout", System.Data.OleDb.OleDbType.VarChar);
cmd.Parameters["Clockout"].Value = this.clockinLabel.Text;
cmd.CommandText = "UPDATE [timecard] SET [Employee]=@Employee, [Clockout]=@Clockout";
conn.Open();
int numberOfRows = cmd.ExecuteNonQuery();
conn.Close();
}
}发布于 2013-05-06 14:42:43
感谢所有帮助我克服困难并提供建议的人。
显然,我找到了一个解决方案。最好将值存储为字符串,然后使用WHERE子句对其进行更新。由于某些原因,它不会直接从文本字段中获取值。
发布于 2013-05-03 19:44:59
如果两个按钮都是INSERTing记录,则两个按钮都在运行相同的代码。检查您的.aspx页面,看看这两个按钮是否恰好具有相同的onClick=属性。
https://stackoverflow.com/questions/16356267
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