How to set combobox default value

Question

In windows form  It has a ComboBox  Which have data binded by the DataSource   When going to set the text property for a ComboBox       Selected  ComboBox -  Property -  Text    --Select--     Design page shows the given text  But when run the application the given text disappeard and the initial index value of a comboBox item appeared  Which is from the DataSource   So i gave the ComboBox text in the Form load  I mean in the Constructor  public myform          InitializeComponent         ComboBox Text  --Select--       link revised and more  But     Setting default item in combo box  https   msdn microsoft com en-us library system windows forms combobox text v vs 110  aspx  Searched lot of question in SO depends to ComboBox  But those never solve my case  Edited    In that combobox  Click the right top corner   From that i choosed data for my combobox by using Datasouce  I didn t write any code for add items into combobox

User · Accepted Answer

You can do something like this       public myform                  InitializeComponent       this will be called in ComboBox ComboBox   new System Windows Forms ComboBox               private void Form1 Load object sender  EventArgs e                   TODO  This line of code loads data into the  myDataSet someTable  table  You can move  or remove it  as needed          this myTableAdapter Fill this myDataSet someTable           comboBox1 SelectedItem   null          comboBox1 SelectedText    --select--

User · Answer

Suppose you bound your combobox to a List lt Person gt   List lt Person gt  pp   new List lt Person gt     pp Add new Person    id   1  name  Steve     pp Add new Person    id   2  name  Mark     pp Add new Person    id   3  name  Charles      cbo1 DisplayMember    name   cbo1 ValueMember    id   cbo1 DataSource   pp    At this point you cannot set the Text property as you like  but instead you need to add an item to your list before setting the datasource   pp Insert 0  new Person    id -1  name  --SELECT--     cbo1 DisplayMember    name   cbo1 ValueMember    id   cbo1 DataSource   pp  cbo1 SelectedIndex   0    Of course this means that you need to add a checking code when you try to use the info from the combobox  if cbo1 SelectedValue    null  amp  amp  Convert ToInt32 cbo1 SelectedValue     -1      MessageBox Show  Please select a person name    else               The code is the same if you use a DataTable instead of a list  You need to add a fake row at the first position of the Rows collection of the datatable and set the initial index of the combobox to make things clear  The only thing you need to look at are the name of the datatable columns and which columns should contain a non null value before adding the row to the collection  In a table with three columns like ID  FirstName  LastName with ID FirstName and LastName required you need to  DataRow row   datatable NewRow    row  ID     -1  row  FirstName      --Select--       row  LastName      FakeAddress   dataTable Rows InsertAt row  0

[c#] How to set combobox default value?

Examples related to c#

Examples related to winforms

Examples related to combobox