'System.Data.Entity.DynamicProxies.ProductDoes not contain a property
with the name ‘ProductId’
I got this error “System.Data.Entity.DynamicProxies.Product Does not contain a property with the name ‘ProductId” while binding the object to the dropdownlist using the c# .net.
Problem:
public void LoadProductsDropDownList()
{
cboProducts.DataTextField = "Name";
cboProducts.DataValueField = "ProductId ";
cboProducts.DataSource = db.Products.ToList();
cboProducts.DataBind();
ListItem li = new ListItem("Select Product", "-1");
cboProducts.Items.Insert(0, li);
}
Solution:
I found the cause of this error due to by mistaken; I left space in DataValueField property field productId . Also, it will happen if you misspelled DataTextField or DataValuefield property values.
public void LoadProductsDropDownList()
{
cboProducts.DataTextField = "Name";
cboProducts.DataValueField = "ProductId";
cboProducts.DataSource = db.Products.ToList();
cboProducts.DataBind();
ListItem li = new ListItem("Select Product", "-1");
cboProducts.Items.Insert(0, li);
}