Databases
StackOverflow2013
Postsdbo
POstrange asp.net dropdownlist selecte value not set
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POstrange asp.net dropdownlist selecte value not set
    primarykey
    data
    text
    <p>I use the following code to populate my drop down list:</p> <pre><code>if (ddl_year.Items.Count == 0) { int current_year = System.DateTime.Now.Year; for (int i = 1; i &lt; 11; i++) { ListItem li = new ListItem((current_year - i).ToString(), (current_year - i).ToString()); ddl_year.Items.Add(li); } ddl_year.SelectedIndex = 0; } </code></pre> <p>then later, I use i set the selected value as follow:</p> <pre><code>ddl_year.SelectedValue="2010"; </code></pre> <p>The selected value remains <code>2012</code>; Can someone tell me what i'm doing wrong? The strange thing is that i do exactly the same thing for an other drop down list which get a selected value of <code>2009</code> and that value is shown correctly. </p> <p>Any comment will be highly appreciated.</p> <p>Thanks in advance</p> <p>More details about the actual program:</p> <pre><code>if (!Page.IsPostback) { FillYears(ddl_year_B); // The content of this method is what i desribed ealier in my post. FillYears(ddl_year_A); if (Session[CurrentCompareYearWithSessionKey] == null) Session[CurrentCompareYearWithSessionKey] = Monitor_year - 1; ddl_year_B.SelectedValue = Session[CurrentCompareYearWithSessionKey].ToString();//Works as expected if (Session[CurrentSelectedYearSessionKey] == null) Session[CurrentSelectedYearSessionKey] = Monitor_year; ddl_year_A.SelectedValue = Session[CurrentSelectedYearSessionKey].ToString();// Does not work as expected } </code></pre> <p>And below the aspx markup:</p> <pre><code>&lt;td &gt; Year:&lt;/td&gt; &lt;td &gt; &lt;asp:DropDownList ID="ddl_year_A" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddl_year_A_SelectedIndexChanged"&gt; &lt;/asp:DropDownList&gt; &lt;/td&gt; &lt;td &gt;Compared year:&lt;/td&gt; &lt;td &gt; &lt;asp:DropDownList Width="80px" ID="ddl_year_B" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddl_year_B_SelectedIndexChanged"&gt; &lt;/asp:DropDownList&gt; &lt;/td&gt; </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMeelfan Bmfp
    1. USMeelfan Bmfp
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POstrange asp.net dropdownlist selecte value not set
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POstrange asp.net dropdownlist selecte value not set
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    3. VO
      singulars
      1. POstrange asp.net dropdownlist selecte value not set
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COinstead of setting `SselectedValue` set `SelectedIndex` property .
      singulars
      1. POstrange asp.net dropdownlist selecte value not set
      1. USSudhakar Tillapudi
    2. CO@SudhakarTillapudi SelectedIndex is not what is needed, because he is trying to select the needed item based on its value, not its position in the item list. @ Meelfan: The population of the dropdownlist seems correct, could you add a code snippet of the part where you try to set the SelectedValue property? (Specifically: Are you setting the SelectedValue after a postback? Is the dropdownlist part of the .aspx page, or do you create this control dynamically in code-behind?)
      singulars
      1. POstrange asp.net dropdownlist selecte value not set
      1. USFlater
    3. COare you getting an exception or anything when you try and select the value? are you trying to select before or after you populate the list? does this happen in postback? we need some more info to try and help.
      singulars
      1. POstrange asp.net dropdownlist selecte value not set
      1. USroyse41
 

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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload