逻辑问题再次出现 [英] problem again about logic
本文介绍了逻辑问题再次出现的处理方法，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
I develop the form in asp.net which have two database tables
Student
StudentId(int,not null)
FullName(nvarchar(30),not null))
DOB(smalldatetime)
StudentCertificates
StudentCerificateId(int,not null,pk)
StudentId(int,not null,pk)
CertificateName(nvarchar(30))
CertificateDate(smalldatetime)
Below is the code
page.aspx
<pre lang="xml"><div>
<script language="javascript" type="text/javascript">
function validate() {
if (document.getElementById("<%=TextBox1.ClientID %>").value == "") {
alert("Student Id is Required");
document.getElementById("<%=TextBox1.ClientID%>").focus();
return focus();
}
if (document.getElementById("<%=TextBox2.ClientID %>").value == "") {
alert("FullName is Required");
document.getElementById("<%=TextBox2.ClientID%>").focus();
return focus();
}
if (document.getElementById("<%=TextBox3.ClientID %>").value == "") {
alert("DOB is Required");
document.getElementById("<%=TextBox3.ClientID%>").focus();
return focus();
}
</script>
<asp:Panel ID="Panel1" runat="server"
style="position: relative; top: 35px; left: 353px; width: 425px;">
<asp:Label ID="Label1" runat="server" Text="SudentRegistration"></asp:Label>
<br />
<br />
<asp:Label ID="Label2" runat="server" Text="StudentId" AssociatedControlID="TextBox1"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server" height="19px"
style="position: relative" ontextchanged="TextBox1_TextChanged"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="TextBox1" ErrorMessage="Id is Required"
ValidationGroup="Student Registration">*</asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label3" runat="server" AssociatedControlID="TextBox2"
Text="FullName"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
ControlToValidate="TextBox2" ErrorMessage="Name is Required"
ValidationGroup="Student Registration">*</asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label4" runat="server" AssociatedControlID="TextBox3" Text="DOB"></asp:Label>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
ControlToValidate="TextBox3" ErrorMessage="DOB is Required"
ValidationGroup="Student Registration">*</asp:RequiredFieldValidator>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Insert" ValidationGroup="Student Registration" onclick="Button1_Click" />
<br />
</asp:Panel>
</div>
<asp:Panel ID="Panel2" runat="server"
style="position: relative; top: 59px; left: 354px; width: 425px; height: 297px">
<asp:Label ID="Label10" runat="server" Text="Student Certificates"></asp:Label>
<br />
<br />
<asp:Label ID="Label6" runat="server" Text="StudentId" AssociatedControlID="TextBox4"></asp:Label>
<asp:TextBox ID="TextBox4" runat="server" height="19px"
ontextchanged="TextBox1_TextChanged" style="position: relative"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"
ControlToValidate="TextBox4" ErrorMessage="Id is Required"
ValidationGroup="Student Certificates">*</asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label7" runat="server" Text="CertificateId" AssociatedControlID="TextBox7"></asp:Label>
<asp:TextBox ID="TextBox5" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server"
ControlToValidate="TextBox5" ErrorMessage="CertificateId is Required"
ValidationGroup="Student Certificates">*</asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label5" runat="server" Text="CertificateName" AssociatedControlID="TextBox6"></asp:Label>
<asp:TextBox ID="TextBox6" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server"
ControlToValidate="TextBox6" ErrorMessage="CertificateName is Required"
ValidationGroup="Student Certificates">*</asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label8" runat="server" Text="CertificateDate" AssociatedControlID="TextBox7"></asp:Label>
<asp:TextBox ID="TextBox7" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server"
ControlToValidate="TextBox7" ErrorMessage="CetificateDate is Required"
ValidationGroup="Student Certificates">*</asp:RequiredFieldValidator>
<br />
<br />
<br />
<asp:Button ID="Button4" runat="server" ValidationGroup="Student Certificates"
Text="Insert" onclick="Button4_Click" />
<br />
<br />
<br />
<br />
</asp:Panel>
<br />
<br />
<br />
<asp:ValidationSummary ID="ValidationSummary1" ValidationGroup="Student Registration" runat="server" />
<asp:ValidationSummary ID="ValidationSummary2" ValidationGroup="Student Certificates" runat="server" />
page.cs
<pre lang="CS">
protected void Button1_Click(object sender, EventArgs e)
{
DateTime mydate;
mydate = Convert.ToDateTime(TextBox3.Text);
SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\omar\Documents\Visual Studio 2010\WebSites\PreInterviewPracticalAssignment\App_Data\Database.mdf;Integrated Security=True;User Instance=True");
con.Open();
string que = "insert into Student(StudentId,FullName,DOB) values(@StudentId,@FullName,@DOB)";
SqlCommand com = new SqlCommand(que, con);
com.Parameters.Add("@StudentId",System.Data.SqlDbType.Int);
com.Parameters.Add("@FullName", System.Data.SqlDbType.NVarChar);
com.Parameters.Add("@DOB", System.Data.SqlDbType.SmallDateTime);
com.Parameters["@StudentId"].Value = TextBox1.Text;
com.Parameters["@FullName"].Value = TextBox2.Text;
com.Parameters["@DOB"].Value = TextBox3.Text;
com.ExecuteNonQuery();
con.Close();
}
protected void Button4_Click(object sender, EventArgs e)
{
DateTime mydate;
mydate = Convert.ToDateTime(TextBox7.Text);
SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\omar\Documents\Visual Studio 2010\WebSites\PreInterviewPracticalAssignment\App_Data\Database.mdf;Integrated Security=True;User Instance=True");
con.Open();
string que1 = "insert into StudentCertificates(StudentId,StudentCertificateId,CertificateName,CertificateDate)values(@StudentId,@StudentCertificateId,@CertificateName,@CertificateDate)";
SqlCommand com = new SqlCommand(que1,con);
com.Parameters.Add("@StudentId", System.Data.SqlDbType.Int);
com.Parameters.Add("@StudentCertificateId", System.Data.SqlDbType.Int);
com.Parameters.Add("@CertificateName", System.Data.SqlDbType.NVarChar);
com.Parameters.Add("@CertificateDate", System.Data.SqlDbType.SmallDateTime);
com.Parameters["@StudentId"].Value = TextBox4.Text;
com.Parameters["@StudentCertificateId"].Value = TextBox5.Text;
com.Parameters["@CertificateName"].Value = TextBox6.Text;
com.Parameters["@CertificateDate"].Value = TextBox7.Text;
com.ExecuteNonQuery();
con.Close();
}
MY PROBLEM IS THAT HOW I APPLY CONDITION?
MY PROBLEM IS THAT HOW I APPLY CONDITION?
limit the records entry to maximum of 5 records.推荐答案
The question is so simple, there was no need to show a whole book of code. Just do this before the INSERT in your Stored Procedure.
The question is so simple, there was no need to show a whole book of code. Just do this before the INSERT in your Stored Procedure.
DECLARE @StudentId = 10
DECLARE @CertCount int
SELECT @CertCount = COUNT(*) FROM StudentCertificates WHERE StudentID = @StudentID
IF (@StudentId >=5)
BEGIN
RAISERROR('Only 5 certificates allowed per student', 1, 1);
END
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