How to insert first blank row to binded ComboBox?

Question

Hello I'm working on Winform application where i have a ComboBox who is binded to some DataSet. Now i want a black first row in the combox (which the user will use as I dont want to select anything! item). how can i do it? I tried to use the Add method of the ComboBox.Items and it works fine but in the top of the combobox and not in the head of it (the last item not the first one). Thanks alot Liran.

Sanjay Chauhan · Answer

Hi If u want to add text like Select or None in combo box (drop down list) in .NET framework window form control. There is no such way to add items in combo box's items property after you set DataSource. To avoid this you can add one more item in your datasource. For example if you are trying to bind combo box list through DataTable then add one more row into DataTable. Here i am posting you sample code for adding one row into the fetched dataTable Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:Table Normal; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:Calibrisans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Times New Roman; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} private void BindCombo() { DataTable dataTable = GetDataTable(); DataRow row = dataTable.NewRow(); row[ Code ] = None ; row[ Name ] = None ; dataTable.Rows.InsertAt(row 0); comboBox1.DisplayMember = Name ; comboBox1.ValueMember = Code ; comboBox1.DataSource = dataTable; }

Michael Braun · Answer

Thanks alot! I Don't have any connection string.. i just get a DataTable from some service.. the field is called Code and the display field is Name (the DataTable i recive is the DataSource of the ComboBox)

Kirtan Patel · Answer

you Need to bind Data Programatically not using Wizards/Smart TAG . you have to add New Blank Row before binding Data to the Combobox ; Tell me The Fields and Connection String of Your Database I will Give you the Code to Bind It Programatically :)

Michael Braun · Answer

Sorry for my English it is not my primary language. If i have a DataSource of items: abcd and right now my ComboBox is: abcd i want it to be: None a b c d (the None is the first item in the ComboBox then all the rest items that came from the DataSource). Hope i was understood :)

Kirtan Patel · Answer

What do you want to do ? Could not understood Do you want to Add Blank at Button of The ComboBox list or At The Top of comboBox List after Dataset has Filling Data in Combobox?