Hello,

If the data has not been inserted to database, you would not be able to show the value. Please let us know about what code that you used in your sample. We need it to investigate your current issue. FYI, We also have a sample about how to add new row in database, AddItem.aspx. 

Regards,
Handy

INSERT INTO [knaso] (COL1, COL2, COL3, ID) VALUES ('1','A1', 'B1, 12);

SELECT TOP(1) COL1 FROM knaso WHERE ID = 12

cWebCombo.Value = COL1; --> new selected value
cWebCombo.RequiresUIRefresh = true;
cWebCombo.DataBind();

// Send the new value to client side
ClientScript.RegisterStartupScript
(GetType(), "Javascript", "javascript: setText('" + id + "'); ", true);

In my client side code, I set the value to WebCombo. Here’s the script below:

function setText(val) {
var WebCombo1 = ISGetObject("WebCombo1");
// Set the WebCombo value
WebCombo1.SetText(val, true);
}