Setting dropdownlist selecteditem programmatically

Question

I want to set the selecteditem attribute for an ASP Net dropdownlist control programmatically   So I want to pass a value to the dropdownlist control to set the selected item where the item is equal to the passed value

User · Answer

ddlData SelectedIndex will contain the int value To select the specific value into DropDown    ddlData SelectedIndex ddlData Items IndexOf ddlData Items FindByText  value       return type of ddlData Items IndexOf ddlData Items FindByText  value     is int

User · Answer

Well if I understood correctly your question  The Solution for setting the value for a given dropdownlist will be   dropdownlist1 Text  Your Value     This will work only if the value is existing in the data-source of the dropdownlist

User · Answer

Assuming the list is already data bound you can simply set the SelectedValue property on your dropdown list   list DataSource   GetListItems        lt -- Get your data from somewhere  list DataValueField    ValueProperty   list DataTextField    TextProperty   list DataBind     list SelectedValue   myValue ToString      The value of the myValue variable would need to exist in the property specified within the DataValueField in your controls databinding   UPDATE  If the value of myValue doesn t exist as a value with the dropdown list options it will default to select the first option in the dropdown list

User · Answer

On load of My Windows Form the comboBox will display the ClassName column of my DataTable as it s the DisplayMember also has its ValueMember  not visible to user  with it   private void Form1 Load object sender  EventArgs e                                this comboBoxSubjectCName DataSource   this Student TableClass                  this comboBoxSubjectCName DisplayMember   TableColumn ClassName   Column name that will be the DisplayMember                 this comboBoxSubjectCName ValueMember   TableColumn ClassID   Column name that will be the ValueMember

User · Answer

ddlemployee DataSource   ds Tables 0               ddlemployee DataTextField    Employee Name               ddlemployee DataValueField    RecId               ddlemployee DataBind                ddlemployee Items Insert 0   All

User · Answer

Just Use this oneliner   divisions Items FindByText  Some Text   Selected   true  divisions Items FindByValue  some value   Selected   true    where divisions is a dropdownlist control   Hope it helps someone

User · Answer

Safety check to only select if an item is matched     try to find item in list    ListItem oItem   DDL Items FindByValue  PassedValue       if exists  select it  if  oItem    null  oItem Selected   true

User · Answer

Here is the code I was looking for    DDL SelectedIndex   DDL Items IndexOf DDL Items FindByText  PassedValue       Or  DDL SelectedIndex   DDL Items IndexOf DDL Items FindByValue  PassedValue

User · Answer

var index   ctx Items FirstOrDefault item   gt  Equals item Value  Settings Default Format Encoding    ctx SelectedIndex   ctx Items IndexOf index     OR  foreach  var listItem in ctx Items    listItem Selected   Equals listItem Value as Encoding  Settings Default Format Encoding     Should work   especially when using extended RAD controls in which FindByText Value doesn t even exist

User · Answer

ddList Items FindByText  oldValue   Selected   false  ddList Items FindByText  newValue   Selected   true

User · Answer

If you need to select your list item based on an expression   foreach  ListItem listItem in list Items        listItem Selected   listItem Value Contains  some value

[c#] Setting dropdownlist selecteditem programmatically

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