问题描述
[编辑:我添加了数据可视化器] 我有一个老师的注册,其中的记录是使用sql数据库中的插入按钮输入的,
private void insertdata(object sender,RoutedEventArgs e)
{
try
{
string name = name_field.Text;
string email = email_field.Text;
string id = id_field.Text;
string gender;
if (male.IsChecked == true)
{
gender = "M";
}
else
gender = "F";
if (String.IsNullOrEmpty(dob.Text))
{
string fe = "01/01/1900 12:00:00 AM";
dt = Convert.ToDateTime(fe);
}
else
{
dt = Convert.ToDateTime(dob.Text);
}
var rich1 = new TextRange(this.history.Document.ContentStart,this.history.Document.ContentEnd);
string teach_history = rich1.Text;
var rich2 = new TextRange(this.achievement.Document.ContentStart,this.achievement.Document.ContentEnd);
string teach_achievement = rich2.Text;
connect();
con.open();
string saved = "insert into teacher_details ([Teacher ID],Name,Gender,Email,[Date of Birth],Employment History,Achievements)values('" + id + "','" + name + "','" + gender + "','" + email + "','" + dt + "','" + teach_history + "','" + teach_achievement + "')";
sqlCommand cmd = new sqlCommand(saved,con);
cmd.ExecuteReader();
con.Close();
MessageBox.Show("record is added");
}
catch(Exception ex)
{
MessageBox.Show("error occured " + ex);
}
我将身份证,性别,姓名,电子邮件,历史记录,成就,出生日期作为我的字段。我为此做了一个课,如下:
class Teacherdetail
{
public string id { get; set; }
public string name { get; set; }
public string email { get; set; }
public string gender { get; set; }
public string history { get; set; }
public string acheive { get; set; }
public DateTime dob { get; set; }
}
在rdlc报告中,我使用对象作为我的数据集并选择Teacherdetail。然后我做了一张桌子,如下:
然后我有一个按钮视图报告,在其中我将详细信息调用到称为教师报告的报告查看器中
ReportDataSource reportDataSource = new ReportDataSource();
connect();
con.open();
sqlDataAdapter adp = new sqlDataAdapter("select [Teacher ID],email,[Employment History],Achievements from teacher_details",con);
DataTable newtab = new DataTable();
adp.Fill(newtab);
reportDataSource.Name = "DataSet1";
reportDataSource.Value = newtab;
teacherreport.LocalReport.ReportPath = "C:\\Users\\Preeti Rawat\\Documents\\Visual Studio 2012\\Projects\\STDNT\\STDNT\\teacherreport.rdlc";
teacherreport.LocalReport.DataSources.Add(reportDataSource);
teacherreport.LocalReport.Refresh();
teacherreport.RefreshReport();
我的问题是ID,历史记录,名称和成就丢失了。
当我调试程序时,在我的数据可视化器中它确实表明信息正在传递。 但是在程序中时它仍然没有出现。问题可能是什么,如何解决?谢谢^^
解决方法
对于您的特定问题,在您的insertdata
中,您正在呼叫ExecuteReader
插入新记录,这是错误的。您需要调用ExecuteNonQuery
到INSERT,UPDATE,DELETE
个操作。
另外,在:
string saved = "insert into teacher_details ([Teacher ID],Name,Gender,Email,[Date of Birth],Employment History,Achievements)values('" + id + "','" + name + "','" + gender + "','" + email + "','" + dt + "','" + teach_history + "','" + teach_achievement + "')";
这应该返回一个SQL错误,因为Employment History
不包含在括号[]
中。
这是您方法的修订版。 (我试图保持相同的工作)。
var name = name_field.Text;
var name = name_field.Text;
var email = email_field.Text;
var id = id_field.Text;
var gender = male.IsChecked ? "M" : "F";
var dt = DateTime.TryParse(dob.Text,out DateTime result) ? result : new DateTime(1900,1,1);
var teach_history = new TextRange(this.history.Document.ContentStart,this.history.Document.ContentEnd).Text;
var teach_achievement = new TextRange(this.achievement.Document.ContentStart,this.achievement.Document.ContentEnd).Text;
const string query = "INSERT INTO teacher_details([Teacher ID],[Employment History],Achievements) VALUES ('{0}','{1}','{2}','{3}','{4}','{5}','{6}'); ";
var saved = string.Format(query,id,name,gender,email,dt.ToString("yyyy-MM-ddThh:mm:ss"),teach_history,teach_achievement)
connect();
con.Open();
using(var cmd = new SqlCommand(saved,con))
{
cmd.ExcuteNonQuery();
}
con.Close();
MessageBox.Show("record is added");
您应在using
上使用SqlConnection
块,或手动处置连接。另外,我建议您开始使用Entity Framework
代替数据库操作。
对于报告部分,您需要执行以下操作:
var table = new DataTable();
const string query = "SELECT [Teacher ID],Achievements from teacher_details";
connect();
con.Open();
var adapter = new SqlDataAdapter(query,con);
adapter.Fill(table);
var reportDataSource = new ReportDataSource("Dataset1",table);
teacherreport.LocalReport.ReportPath = "C:\\Users\\Preeti Rawat\\Documents\\Visual Studio 2012\\Projects\\STDNT\\STDNT\\teacherreport.rdlc";
teacherreport.LocalReport.DataSources.Clear();
teacherreport.LocalReport.DataSources.Add(reportDataSource);
teacherreport.LocalReport.Refresh();
teacherreport.RefreshReport();
,
之所以不起作用,是因为类名与表的字段名不同。它们必须相同。因此,我更改了数据库表的列名,使其看起来像这样:
教师ID,姓名,性别,电子邮件,出生日期,就业历史,成就
我的课看起来像这样:
public int Teacher_ID { get; set; }
public string Name { get; set; }
public string Gender { get; set; }
public string email { get; set; }
public DateTime Date_of_Birth { get; set; }
public string Employment_History { get; set; }
public string Achievements { get; set; }