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lorsque j'essaie d'afficher le résultat dans gridview en utilisant LINQ je reçois ce message d'erreur. "DataSource et DataSourceID sont définis sur" GridView1 "Supprimer une définition." Je ne comprends pas quoi faire? Voici mon codeproblème dans gridview avec LINQ
protected void SelectBtn_Click(object sender, EventArgs e)
{
ShowEmployee();
}
private void ShowEmployee()
{
DataClassesDataContext db = new DataClassesDataContext();
var name = from E in db.Employees
orderby E.Age ascending
select E;
GridView1.DataSource = name;
GridView1.DataBind();
}
protected void InsertBtn_Click(object sender, EventArgs e)
{
int id = Convert.ToInt32(TxtId.Text);
string name = TxtName.Text;
string address = TxtAddress.Text;
int age = Convert.ToInt32(TxtAge.Text);
DataClassesDataContext db = new DataClassesDataContext();
try
{
Employee emp = new Employee { EmployeeId = id, Name = name, Address = address, Age = age };
db.Employees.InsertOnSubmit(emp);
db.SubmitChanges();
LblMessage.Text = "Employee has been added successfully";
TxtId.Text = "";
TxtName.Text = "";
TxtAddress.Text = "";
TxtAge.Text = "";
ShowEmployee();
}
catch (Exception ee)
{
LblMessage.Text = ee.Message.ToString();
}
}
protected void UpdateBtn_Click(object sender, EventArgs e)
{
string name=TxtName.Text;
string address=TxtAddress.Text;
DataClassesDataContext db = new DataClassesDataContext();
Employee emp = db.Employees.FirstOrDefault(E => E.Name.StartsWith(name));
emp.Address = address;
db.SubmitChanges();
ShowEmployee();
}
protected void DeleteBtn_Click(object sender, EventArgs e)
{
DataClassesDataContext db = new DataClassesDataContext();
Employee emp = db.Employees.Single(E => E.Address.StartsWith("Delhi"));
db.Employees.DeleteOnSubmit(emp);
db.SubmitChanges();
ShowEmployee();
}