Hi Ben,
Please refer to the
MultiColumnComboBox test sample attached here. It has 2 columns in its dropdown whose width is adjusted so that they occupy the entire width of the dropdown equally.
// Set column width to occupy the entire dropdown width
this.multiColumnComboBox1.ListBox.Grid.Model.ColWidths[2] = this.multiColumnComboBox1.Bounds.Width/2;
this.multiColumnComboBox1.ListBox.Grid.Model.ColWidths[3] = this.multiColumnComboBox1.Bounds.Width/2;
Refer to the sample and let me know if you need further assistance. We appreciate your interest in Syncfusion products.
Regards,
Guru Patwal
Syncfusion, Inc.