ASP.NET 解決 TextBox 按 Enter 鍵會自動 PostBack

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1.只有一個TextBox時，按 Enter 鍵"不PostBack"
Me.TextBox1.Attributes.Add("onkeypress", "if( event.keyCode == 13 ) { return false; }")

2.二個以上的 TextBox，按 Enter "自動PostBack"
Me.TextBox1.Attributes.Add("onkeypress", "if( event.keyCode == 13 ) {" & Me.ClientScript.GetPostBackEventReference(Me.TextBox1, "") & "}")
Me.TextBox2.Attributes.Add("onkeypress", "if( event.keyCode == 13 ) {" & Me.ClientScript.GetPostBackEventReference(Me.TextBox2, "") & "}")