在ASP.NET中计算在线考试网站的百分比并显示正确的答案 [英] Calculating percentage and displaying correct answer for online examination website in ASP.NET
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问题描述
谢谢！
我的尝试：
protected void examsubmit_Click（ object sender，EventArgs e）{
DataTable dt = new DataTable（）;
string sqlStatement = SELECT * FROM [生物学];
SqlConnection con = new SqlConnection（ConfigurationManager.ConnectionStrings [ RegistrationConnectionString2]。ConnectionString）;
使用（SqlCommand cmd = new SqlCommand（sqlStatement，con））
{
cmd.CommandType = CommandType.Text;
使用（SqlDataAdapter da = new SqlDataAdapter（cmd））
{
da.Fill（dt）;
if （dt.Rows.Count > 0 ）
{
int index = 0 ;
foreach （GridViewRow row in grdquestions.Rows）
{
RadioButton rb1 =（RadioButton）row.FindControl（ Option1）;
RadioButton rb2 =（RadioButton）row.FindControl（ Option2）;
RadioButton rb3 =（RadioButton）row.FindControl（ Option3）;
RadioButton rb4 =（RadioButton）row.FindControl（ Option4）;
//
int marks = Convert.ToInt32（dt.Rows [index] [ Marks]）;
if （rb1！= null || rb2！= null || rb3！= null || rb4！= null ）
if （rb1.Text == dt.Rows [index] [ 回答]。ToString（））
{
// 如果匹配则执行某些操作
rb1.Checked = true ;
}
else if （rb2.Text == dt.Rows [index] [ 答案]。ToString（） ）
{
// 如果匹配则执行某些操作
rb2.Checked = true ;
}
else if （rb3.Text == dt.Rows [index] [ 答案]。ToString（） ）
{
// 如果匹配则执行某些操作
rb3.Checked = true ;
}
else if （rb4.Text == dt.Rows [index] [ 答案]。ToString（） ）
{
// 如果匹配则执行某些操作
rb4.Checked = true ;
}
index ++;
int total = index * marks;
Label2.Text = FinalScore为： + total;
}
}
}
}
}
解决方案
那是因为你只告诉它显示总数：即索引*标记
你在循环中设置它，所以它只会显示最后一行的数据。
如果你想显示其他信息，你必须添加代码来做到这一点！ （并且可能在循环之外进行检查所有答案......）
hey everyone i am on online examination website project in asp.net i want to calculate the percentage , to display the no of correct answers , and the final score by(multiplying [marks] and no of correct answers) here is my code it only displays correct answers not the incorrect answers
THANK YOU!
What I have tried:
protected void examsubmit_Click(object sender, EventArgs e) {
DataTable dt = new DataTable();
string sqlStatement = "SELECT * FROM [Biology]";
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["RegistrationConnectionString2"].ConnectionString);
using (SqlCommand cmd = new SqlCommand(sqlStatement, con))
{
cmd.CommandType = CommandType.Text;
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
da.Fill(dt);
if (dt.Rows.Count > 0)
{
int index = 0;
foreach (GridViewRow row in grdquestions.Rows)
{
RadioButton rb1 = (RadioButton)row.FindControl("Option1");
RadioButton rb2 = (RadioButton)row.FindControl("Option2");
RadioButton rb3 = (RadioButton)row.FindControl("Option3");
RadioButton rb4 = (RadioButton)row.FindControl("Option4");
//
int marks = Convert.ToInt32(dt.Rows[index]["Marks"]);
if (rb1 != null || rb2 != null || rb3 != null || rb4 != null)
if (rb1.Text == dt.Rows[index]["Answer"].ToString())
{
//do something if matched
rb1.Checked = true;
}
else if (rb2.Text == dt.Rows[index]["Answer"].ToString())
{
//do something if matched
rb2.Checked = true;
}
else if (rb3.Text == dt.Rows[index]["Answer"].ToString())
{
//do something if matched
rb3.Checked = true;
}
else if (rb4.Text == dt.Rows[index]["Answer"].ToString())
{
//do something if matched
rb4.Checked = true;
}
index++;
int total =index * marks;
Label2.Text = "FinalScore is :" + total;
}
}
}
}
} 解决方案
That's because you have only told it to display the total: i.e. index * marks
And you are setting that inside a loop, so it will only ever show the last rows worth of data.
If you want to to show other information, you have to add code to do that! (And probably do it outside the loop which checks all of the answers...)
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