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20118586
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2013-11-21T10:38:19.707
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2013-11-21T10:38:19.707
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I haven't tested but sure this is what you are looking for: CODE BEHIND CHANGES: <pre><code>protected void Page_Load(object sender, EventArgs e) { //Bind data to first drop down box on pageload DropDownList1.DataTextField = "ItemName";//field returned from db DropDownList1.DataValueField = "ItemID";//field returned from db //binds to data returned from db - first items have no parent id's DropDownList1.DataSource = GetItems(0); DropDownList1.DataBind(); DropDownList1.Items.Insert(0, new ListItem("All Borgs", Session["BorgID"].ToString())); DropDownList1.Items[0].Selected = true; } protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { //When value is selected in first drop down populate second drop down using the id selected in first drop down DropDownList2.DataTextField = "ItemName";//field returned from db DropDownList2.DataValueField = "ItemID";//field returned from db //binds to data returned from db DropDownList2.DataSource = GetItems(Convert.ToInt32(DropDownList1.DataValueField)); DropDownList2.DataBind(); DropDownList2.Items.Insert(0, new ListItem("[Choose]", "-1")); DropDownList2.Items[0].Selected = true; } protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e) { //When value is selected in second drop down populate third drop down using the id selected in second drop down DropDownList3.DataTextField = "ItemName";//field returned from db DropDownList3.DataValueField = "ItemID";//field returned from db //binds to data returned from db DropDownList3.DataSource = GetItems(Convert.ToInt32(DropDownList2.DataValueField)); DropDownList3.DataBind(); DropDownList3.Items.Insert(0, new ListItem("[Choose]", "-1")); DropDownList3.Items[0].Selected = true; } public DataTable GetItems(int _ParentItemID) { SqlConnection sqlconn = null; sqlconn = new SqlConnection(); //SQLConnectionstring declared in web.config to connect to db sqlconn.ConnectionString = ConfigurationManager.ConnectionStrings["SQLConnectionstring"].ConnectionString; //select data from database SqlCommand sqlcommand = new SqlCommand("SELECT ItemName, ItemID FROM YourTable WHERE ParentItemID = " + _ParentItemID, sqlconn); sqlcommand.CommandType = System.Data.CommandType.Text; SqlDataAdapter adapter = new SqlDataAdapter(sqlcommand); //create and fill datatable to return results to call and bind DataTable dt = new DataTable(); adapter.Fill(dt); sqlconn.Dispose(); sqlconn.Close(); return dt; } </code></pre> FRONT END CHANGES: <pre><code><asp:DropDownList ID="DropDownList1" runat="server" onselectedindexchanged="DropDownList1_SelectedIndexChanged"> </asp:DropDownList> <asp:DropDownList ID="DropDownList2" runat="server" onselectedindexchanged="DropDownList2_SelectedIndexChanged"> </asp:DropDownList> <asp:DropDownList ID="DropDownList3" runat="server"> </asp:DropDownList> </code></pre>
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1. POHow to search requested page through dropdown lists by selecting categories?
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1. USuser3016621
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Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.