Dropdownlist Selected item Not displaying in messagebox

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Hi All,

I am working asp.net.
i added one dropdownlist and one button to the page. I displayed the item into dropdownlist from database. When i select the item from dropdownlist and clicking on the button it should displaying only the first item from dropdownlist.

Here is my code

C#

 protected void Page_Load(object sender, EventArgs e)
    {
        ddlCategory.DataSource = DBCategory.GetAllCategory();
        ddlCategory.DataValueField = "CategoryId";
        ddlCategory.DataTextField = "CategoryName";
        ddlCategory.DataBind();
}
protected void Search_Click(object sender, EventArgs e)
    {
        int i = ddlCategory.SelectedValue;
}

"i" is displaying first item from the dropdownlist when i select the any item in the dropdownlist..

Please tell me the solution..

Posted 17-Nov-11 22:05pm

Narayan Shanubhog

Updated 17-Nov-11 22:07pm

koolprasad2003

v2

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koolprasad2003 · Answer 1 · 2011-11-17T22:09:00

What happed is when you clicked on button the Page_load gets called, Which will fill your dropdownlist again and selected item gets reset.

To avoid such behavior, Put PageLoad code in !isPostBack

e.g.

C#

protected void Page_Load(object sender, EventArgs e)
    { 
       if (!isPostBack)
        {
           ddlCategory.DataSource = DBCategory.GetAllCategory();
           ddlCategory.DataValueField = "CategoryId";
           ddlCategory.DataTextField = "CategoryName";
           ddlCategory.DataBind();
        }
}

Prince Antony G · Answer 2 · 2011-11-17T22:21:00

Solution 2

C#

if (!IsPostBack)
{

}

Posted 17-Nov-11 22:21pm

Prince Antony G