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protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//query and populate ddlName
string constr = ConfigurationManager.AppSettings["cons"];
SqlConnection myconnection = new SqlConnection(constr);
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter("SELECT fid,fname,price FROM foodtable GROUP BY price, fid, fname ", myconnection);
da.Fill(ds);
GridView1.DataSource = ds.Tables[0];
//GridView1.DataBind();
myconnection.Close();
}
}
protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{
string constr = ConfigurationManager.AppSettings["cons"];
SqlConnection myconnection = new SqlConnection(constr);
string hid = DropDownList1.SelectedValue;
string query = "SELECT price, fid, hid,fname FROM foodtable WHERE hid ='" + hid + "'GROUP BY price, fid, fname ";
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(query, myconnection);
da.Fill(ds, "Table");
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
Style="left: 466px; position: relative; top: 47px" Width="314px" >
<Columns>
<asp:BoundField HeaderText="Foodid" DataField="fid" />
<asp:BoundField HeaderText="Foodname" DataField="fname" />
<asp:BoundField HeaderText="Price" DataField="price" />
<asp:TemplateField HeaderText="Quantity">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Style="position: relative"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle Wrap="True" />
</asp:GridView>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" DataSourceID="SqlDataSource1"
DataTextField="resname" DataValueField="hid" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged1"
Style="left: 218px; position: relative; top: -19px">
</asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:tonivtreepConnectionString %>"
SelectCommand="SELECT [resname], [hid] FROM [resttable] where hid=23"></asp:SqlDataSource>
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