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POOnSelectedIndexChanged don't seem to work
 

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  1. POOnSelectedIndexChanged don't seem to work
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    <p>I am having some trouble getting my code do what I want it to do, and I would appreciate your help.</p> <p>What I would like to do is:</p> <p>From a textbox, I add a name for a product and create a object with that name.</p> <p>The product object is then added to a Dictionary. </p> <p>Then, I want to bind this Dictionary to a dropdown list. </p> <p>If I change the selected item, I want to display the number of the chosen product (Default as 0 when I create the product object).</p> <p>The problem is that when I try to change the item in the dropdown list, nothing happens.</p> <p>Thanx!</p> <p>.aspx</p> <pre><code> &lt;asp:TextBox ID="productText" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;asp:Button ID="newProductButton" runat="server" OnClick="newProduct_Click" /&gt; &lt;div&gt; &lt;asp:DropDownList ID="ddlProducts" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddlProducts_SelectedIndexChanged" &gt; &lt;/asp:DropDownList&gt; &lt;/div&gt; &lt;asp:Label ID="productQuantity" runat="server"&gt;&lt;/asp:Label&gt; </code></pre> <p>.aspx.cs</p> <pre><code>public partial class Pages_productPage : System.Web.UI.Page { string _productName = string.Empty; public Dictionary&lt;string, int&gt; product { get { if (Page.Session["product"] == null) { Dictionary&lt;string, int&gt; product = new Dictionary&lt;string, int&gt;(); Page.Session["product"] = product; } return (Dictionary&lt;string, int&gt;)Page.Session["product"]; } set { Page.Session["product"] = value; } } protected string ProductName { get { return _productName; } set { _productName = value; } } protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { //ddlProducts.Items.Insert(0, new ListItem("Products", "0")); } productLabel.Text = "Product name"; newProductButton.Text = "Add product"; ProductName = productText.Text; } public void newProduct_Click(object sender, EventArgs e) { Product prod = new Product(ProductName); product.Add(prod.GetName(prod), prod.GetQuantity(prod)); BindDictionary(); } private void BindDictionary() { dictonaryRepeater.DataSource = product; dictonaryRepeater.DataBind(); ddlProducts.DataSource = product; ddlProducts.DataValueField = "Value"; ddlProducts.DataTextField = "Key"; ddlProducts.DataBind(); //ddlProducts.Items.Insert(0, new ListItem("Products", "0")); } public void ddlProducts_SelectedIndexChanged(object sender, EventArgs e) { if (ddlProducts.DataValueField == "Banana") { productQuantity.Text = ddlProducts.SelectedItem.ToString(); productQuantity.Visible = true; } } } </code></pre>
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    1. USAndy
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    1. COBy *nothing happens* do you mean a postback does not occur? A postback occurs but your event handler doesn't fire? If you use breakpoints, what gets hit?
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      1. POOnSelectedIndexChanged don't seem to work
      1. USRebecca Chernoff
    2. CODoes it never enter the method you have defined or does it just never do anything?
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      1. POOnSelectedIndexChanged don't seem to work
      1. USJoel Etherton
    3. COIt never enters the ddlProducts_SelectedIndexChanged method.
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      1. POOnSelectedIndexChanged don't seem to work
      1. USAndy
 

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