SelectedValue vs SelectedItem Value of DropDownList

Question

I m working on an old project written and then patched by several people over the years  At some places they have used SelectedValue property and other places they used SelectedItem Value   Question  Is SelectedValue just a syntactic sugar for SelectedItem Value or SelectedValue works differently under the hood  Which one performs better   Edit  SelectedItem Text was replaced with SelectedItem Value

User · Answer

In droupDown list there are two item add property.

1) Text 2) value

If you want to get text property then u use selecteditem.text

and If you want to select value property then use selectedvalue property

In your case i thing both value and text property are the same so no matter if u use selectedvalue or selecteditem.text

If both are different then they give us different results

User · Answer

Be careful using SelectedItem Text    If there is no item selected  then SelectedItem will be null and SelectedItem Text will generate a null-value exception    NET should have provided a SelectedText property like the SelectedValue property that returns String Empty when there is no selected item

User · Answer

They are both different  SelectedValue property gives you the actual value of the item in selection whereas SelectedItem Text gives you the display text  For example  you drop down may have an itme like   lt asp ListItem Text  German  Value  de  gt  lt  asp ListItem gt    So  in this case SelectedValue would be de and SelectedItem Text would give  German   EDIT   In that case  they aare both same     Cause SelectedValue will give you the value stored for current selected item in your dropdown and SelectedItem Value will be Value of the currently selected item   So they both would give you the same result

User · Answer

SelectedValue returns the same value as SelectedItem Value   SelectedItem Value and SelectedItem Text might have different values and the performance is not a factor here  only the meanings of these properties matters    lt asp DropDownList runat  server  ID  ddlUserTypes  gt       lt asp ListItem Text  Admins  Value  1  Selected  true    gt       lt asp ListItem Text  Users  Value  2   gt   lt  asp DropDownList gt    Here  ddlUserTypes SelectedItem Value    ddlUserTypes SelectedValue and both would return the value  1    ddlUserTypes SelectedItem Text would return  Admins   which is different from ddlUserTypes SelectedValue   edit  under the hood  SelectedValue looks like this  public virtual string SelectedValue       get               int selectedIndex   this SelectedIndex          if  selectedIndex  gt   0                        return this Items selectedIndex  Value                    return string Empty            and SelectedItem looks like this   public virtual ListItem SelectedItem       get               int selectedIndex   this SelectedIndex          if  selectedIndex  gt   0                        return this Items selectedIndex                     return null            One major difference between these two properties is that the SelectedValue has a setter also  since SelectedItem doesn t  The getter of SelectedValue is faster when writing code  and the problem of execution performance has no real reason to be discussed  Also a big advantage of SelectedValue is when using Binding expressions   edit data binding scenario  you can t use SelectedItem Value    lt asp Repeater runat  server  gt    lt ItemTemplate gt        lt asp DropDownList ID  ddlCategories  runat  server                          SelectedValue   lt    Eval  CategoryId    gt   gt        lt  asp DropDownList gt    lt  ItemTemplate gt   lt  asp Repeater gt

User · Answer

One important distinction between the two  which is visible in the Reflected code  is that SelectedValue will return an empty string if a nothing is selected  whereas SelectedItem Value will throw a NullReference exception

[asp.net] SelectedValue vs SelectedItem.Value of DropDownList

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