在按钮的onclick事件中，我从aspx页面获取控件，并且我还使用了if语句以查看哪个单选按钮处于活动状态并且已在varialbe中存储相应的值{{1使用此selans，我会将其与隐藏字段的值进行比较，以便查找选中的单选按钮是否为正确答案，如果答案是正确的，即selans中的值与隐藏字段中的值匹配（实际答案）和变量“count”（最初用值0初始化）相应地增加，并且所有这些代码都放在“for循环”中，这将执行到no。 GridView中的控件（您可以将其与问题编号联系起来，就像GridView生成新控件的每个记录一样）。
我使用了变量
1）selans： - 从gridview1获得总分
2）totalgrid1： - 从gridview2获得总分
3）totalgrid2： - total + totalgrid1 ...这是考试的总分
4）totalgrid2： - 从gridview1
5）correct1： - 从gridview2获取正确答案的数量
6）correct2： - correct + correct1 .....用户正确答案总数
在运行此程序后，即尝试正确答案我得到“得分= 6”而不是在结果页面上得到4，因为只有4个问题，每个问题带有1个标记，那么我怎样才能获得6分？和 我也得到了“正确答案的数量=没有显示任何内容（它是空白的）”......它应该显示一些价值。
我无法找出我犯错误的地方。下面是我的代码。看看我的代码。告诉我我犯错的地方和解决方案
correct2Result.aspx.cs： -
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
public partial class Student_Examdemo : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GridView1.DataSource = GetData("SELECT top 2 Question, Option1, Option2, Option3, Option4, CorrectAns, Explanation FROM Questions");
GridView1.DataBind();
GridView2.DataSource = GetData("SELECT top 2 Question, Option1, Option2, Option3, Option4, CorrectAns, Explanation FROM Questions WHERE SectionId=2");
GridView2.DataBind();
}
}
private DataSet GetData(string query)
{
string conString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand cmd = new SqlCommand(query);
using (SqlConnection con = new SqlConnection(conString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataSet ds = new DataSet())
{
sda.Fill(ds);
return ds;
}
}
}
}
protected void btn_Click(object sender, EventArgs e)
{
RadioButton r1, r2, r3, r4;
HiddenField hdn;
int count = 0;
int neg = 0;
int total=0;
int totalgrid1=0;
int totalgrid2=0;
int attempt1 = 0;
int attempt2 = 0;
int Tattempt = 0;
int correct = 0;
int correct1 = 0;
int correct2 = 0;
string selans = "-1";
for (int i = 0; i < GridView1.Rows.Count; i++)
{
r1 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad1");
r2 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad2");
r3 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad3");
r4 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad4");
hdn = (HiddenField)GridView1.Rows[i].Cells[0].FindControl("hf");
if (r1.Checked)
{
selans = r1.Text;
}
else if (r2.Checked)
{
selans = r2.Text;
}
else if (r3.Checked)
{
selans = r3.Text;
}
else if (r4.Checked)
{
selans = r4.Text;
}
if(r1.Checked || r2.Checked || r3.Checked || r4.Checked)
{
attempt1++;
if (hdn.Value == selans)
{
count++;
correct1++;
}
else
{
neg--;
}
}
totalgrid1 = count + neg;
}
for (int i = 0; i < GridView2.Rows.Count; i++)
{
r1 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad1");
r2 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad2");
r3 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad3");
r4 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad4");
hdn = (HiddenField)GridView2.Rows[i].Cells[0].FindControl("hf");
if (r1.Checked)
{
selans = r1.Text;
}
else if (r2.Checked)
{
selans = r2.Text;
}
else if (r3.Checked)
{
selans = r3.Text;
}
else if (r4.Checked)
{
selans = r4.Text;
}
if (r1.Checked || r2.Checked || r3.Checked || r4.Checked)
{
attempt2++;
if (hdn.Value == selans)
{
count++;
correct2++;
}
else
{
neg--;
}
}
totalgrid2 = count + neg;
}
total = totalgrid1 + totalgrid2;
Tattempt = attempt1 + attempt2;
correct = correct1 + correct2;
Label2.Text = total.ToString();
Label3.Text = Tattempt.ToString();
Label4.Text = correct.ToString();
Response.Redirect("/Student/Result.aspx?Score=" + Label2.Text +"&AttemptedQues=" +Label3.Text+ "&CorrectAns" +Label4.Text);
}
}
答案 0 :(得分：1)
我通过在按钮的onclick事件上设置断点来了解我犯错误的地方。
以下是解决方案：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
public partial class Student_Examdemo : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GridView1.DataSource = GetData("SELECT top 2 Question, Option1, Option2, Option3, Option4, CorrectAns, Explanation FROM Questions");
GridView1.DataBind();
GridView2.DataSource = GetData("SELECT top 2 Question, Option1, Option2, Option3, Option4, CorrectAns, Explanation FROM Questions WHERE SectionId=2");
GridView2.DataBind();
}
}
private DataSet GetData(string query)
{
string conString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand cmd = new SqlCommand(query);
using (SqlConnection con = new SqlConnection(conString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataSet ds = new DataSet())
{
sda.Fill(ds);
return ds;
}
}
}
}
protected void btn_Click(object sender, EventArgs e)
{
RadioButton r1, r2, r3, r4;
HiddenField hdn;
int count1 = 0;
int count2 = 0;
int neg1 = 0;
int neg2 = 0;
int total=0;
int totalgrid1=0;
int totalgrid2=0;
int attempt1 = 0;
int attempt2 = 0;
int Tattempt = 0;
int correct = 0;
int correct1 = 0;
int correct2 = 0;
string selans = "-1";
for (int i = 0; i < GridView1.Rows.Count; i++)
{
r1 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad1");
r2 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad2");
r3 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad3");
r4 = (RadioButton)GridView1.Rows[i].Cells[0].FindControl("rad4");
hdn = (HiddenField)GridView1.Rows[i].Cells[0].FindControl("hf");
if (r1.Checked)
{
selans = r1.Text;
}
else if (r2.Checked)
{
selans = r2.Text;
}
else if (r3.Checked)
{
selans = r3.Text;
}
else if (r4.Checked)
{
selans = r4.Text;
}
if(r1.Checked || r2.Checked || r3.Checked || r4.Checked)
{
attempt1++;
if (hdn.Value == selans)
{
count1++;
correct1++;
}
else
{
neg1--;
}
}
totalgrid1 = count1 + neg1;
}
for (int i = 0; i < GridView2.Rows.Count; i++)
{
r1 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad1");
r2 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad2");
r3 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad3");
r4 = (RadioButton)GridView2.Rows[i].Cells[0].FindControl("rad4");
hdn = (HiddenField)GridView2.Rows[i].Cells[0].FindControl("hf");
if (r1.Checked)
{
selans = r1.Text;
}
else if (r2.Checked)
{
selans = r2.Text;
}
else if (r3.Checked)
{
selans = r3.Text;
}
else if (r4.Checked)
{
selans = r4.Text;
}
if (r1.Checked || r2.Checked || r3.Checked || r4.Checked)
{
attempt2++;
if (hdn.Value == selans)
{
count2++;
correct2++;
}
else
{
neg2--;
}
}
totalgrid2 = count2 + neg2;
}
total = totalgrid1 + totalgrid2;
Tattempt = attempt1 + attempt2;
correct = correct1 + correct2;
Label2.Text = total.ToString();
Label3.Text = Tattempt.ToString();
Label4.Text = correct.ToString();
Response.Redirect("/Student/Result.aspx?Score=" + Label2.Text +"&AttemptedQues=" +Label3.Text+ "&CorrectAns=" +Label4.Text);
}
}