❔ ✅ Cant select an attribute of an object for display in a combobox or textbox
Hey Yall, working on a winforms grading application and having a wierd issue I cannot resolve. Instead of displaying a students name, or the assignments name, it just displays MidtermLib.Student, or MidtermLib.Assignment. I have tried to use the combobox methods DisplayMember and ValueMember to select the right column of the list based on the correct person, but it doesnt seem to be working. I have included a screenshot of the issue and the relevant code, any additional information needed I can provide. Thanks!
2 Replies
private void Form4_Load_1(object sender, EventArgs e)
{
// Populate ComboBox1 with all Student names
students = dbManager.GetStudents();
comboBox1.DisplayMember = "FullName";
comboBox1.ValueMember = "StudentID";
comboBox1.DataSource = students;
// Populate ComboBox2 with all Assignment names
assignments = dbManager.GetAssignments();
comboBox2.DisplayMember = "AssignmentName";
comboBox2.ValueMember = "AssignmentID";
comboBox2.DataSource = assignments;
// Update Earned Points and Total Points text boxes
ComboBox_SelectedIndexChanged(this, EventArgs.Empty);
}
private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox1.SelectedItem != null && comboBox2.SelectedItem != null)
{
CompletedAssignment assignment = (CompletedAssignment)comboBox2.SelectedItem;
//Student student = (Student)comboBox1.SelectedItem;
//textBox2.Text = assignment.TotalPoints.ToString();
textBox1.Text = assignment.EarnedPoints.ToString();
}
}
Methods in question ^^^
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