[英]Insert dropdownlist value in database
我有一個DropDownList,並且已將其綁定到表。 問題是當我嘗試將dropDownlist控件的選定值插入數據庫時,我沒有獲得正確的值,而是獲得了2和1的整數數據。
這是我的dropdownList控件:
<asp:DropDownList
ID="ddlproductName"
runat="server"
DataTextField="Prod_Name"
DataValueField= "Product_Id"
>
</asp:DropDownList>
后面的代碼:
protected void Page_Load(object sender, EventArgs e)
{
ddlproductName.SelectedIndex = 0;
if (!IsPostBack)
{
tbDate.Text = DateTime.Today.ToShortDateString();
string cs = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlConnection con = new SqlConnection(cs))
{
SqlCommand cmd = new SqlCommand("Select Product_Id,Prod_Name from Add_Product", con);
con.Open();
SqlDataReader rdr = cmd.ExecuteReader();
ddlproductName.DataSource = rdr;
ddlproductName.DataBind();
}
}
}
protected void btnPurchase_Click(object sender, EventArgs e)
{
try
{
string custName = tbcustName.Text;
string prodName = ddlproductName.SelectedValue;
int quantity = Convert.ToInt32(tbQuantity.Text);
string date = tbDate.Text;
string voucherNo = tbVoucher.Text;
double amount = Convert.ToDouble(tbAmount.Text);
PurchProduct purch = new PurchProduct(custName, prodName, quantity, date, voucherNo, amount);
ConnectionClass.purchaseProd(purch);
LblPurchase.Text = "Submitted succesfully";
}
而purchaseProd方法如下:
public static void purchaseProd(PurchProduct purchase)
{
cmd = new SqlCommand("insert into TblPurchase(custName, prodName, quantity, date,voucherNo,amount) values (@custName, @prodName, @quantity, @date,@voucherNo,@amount)", con);
cmd.Parameters.AddWithValue("@custName", purchase.custName);
cmd.Parameters.AddWithValue("@prodName", purchase.prodName);
cmd.Parameters.AddWithValue("@quantity", purchase.quantity);
cmd.Parameters.AddWithValue("@date", purchase.date);
cmd.Parameters.AddWithValue("@voucherNo", purchase.voucherNo);
cmd.Parameters.AddWithValue("@amount",purchase.amount);
try
{
con.Open();
cmd.ExecuteNonQuery();
}
finally
{
con.Close();
cmd.Parameters.Clear();
}
}
看起來您使用Product_ID作為SelectedValue,在下拉菜單中將SelectedValue更改為Prod_Name。
如果要從所選值中獲取產品名稱,則應將其綁定為DataValueField而不是DataTextField
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