Gets or sets the caption for the Insert button in a System.Web.UI.WebControls.CommandField field.
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When the ButtonFieldBase.ButtonType property of a System.Web.UI.WebControls.CommandField field is set to ButtonType.Button or ButtonType.Link, use the CommandField.InsertText property to specify the text to display for the Insert button.
As an alternative to displaying text for the Insert button, you can display an image by first setting the ButtonFieldBase.ButtonType property to ButtonType.Image and then setting the CommandField.InsertImageUrl property.
The value of this property, when set, can be saved automatically to a resource file by using a designer tool. For more information, see System.ComponentModel.LocalizableAttribute and ASP.NET Globalization and Localization.