dropdownlist not appearing database values

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Hi I have use inner join to get my values from database, I want it to appear in my dropdownlist, but why my dropdownlist do not have the values from database , here is my code.

C#

if (!IsPostBack) //aspx.cs
{
ListItem> allrID = new List<item>();
allID = diBLL.rID();
ddl_ID.DataSource = allID;
ddl_ID.DataBind();
ddl_ID.Items.Insert(0, new ListItem("--Select--", "0"));
}



//aspxID :<asp:DropDownList ID="ddl_ID" runat="server" DataTextField="ID" DataValueField="ID"

C#

//sql

public List<item> getrID()
{
List<item> IDAll = new List<tem>();

int ID;

string queryStr = "Select Item.ID FROM Item JOIN Food on Item.ID= FoodID ";

SqlConnection conn = new SqlConnection(_connStr);
SqlCommand cmd = new SqlCommand(queryStr, conn);

conn.Open();
SqlDataReader dr = cmd.ExecuteReader();

while (dr.Read())
{
string id = dr["Food.ID"].ToString();
ID = int.Parse(id);
IDAll.Add(new Item (ID));
}

conn.Close();
dr.Close();
dr.Dispose();

return IDAll;

}

Posted 7-Feb-14 2:58am

Member 10574155

Updated 7-Feb-14 3:32am

v5

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Comments

ZurdoDev 7-Feb-14 9:14am

Just trace it and find out. Run that SQL in SQL Management Studio and see what you get.

Member 10574155 7-Feb-14 9:24am

The query is correct, but when I run the data is empty.

V. 7-Feb-14 9:24am

Shouldn't it be INNER JOIN instead of JOIN ?

Member 10574155 7-Feb-14 9:32am

I change to inner join still can't

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Karthik_Mahalingam · Answer 1 · 2014-02-07T04:28:00

Try this

C#

public List<item> getrID()
{
List<item> IDAll = new List<item>();
 
int ID;
 
string queryStr = "Select Item.ID FROM Item JOIN Food on Item.ID= Food.ID ";
 
SqlConnection conn = new SqlConnection(_connStr);
SqlCommand cmd = new SqlCommand(queryStr, conn);
 
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
 
while (dr.Read())
{
string id = dr["ID"].ToString();
ID = int.Parse(id);
IDAll.Add(new Item (ID));
}
 
conn.Close();
dr.Close();
dr.Dispose();
 
return IDAll;
 
}</item></item></item>