Sets the width of all the columns in the current range. One unit of column width is equal to the width of one character in the Normal style. For proportional fonts, the width of the character 0 (zero) is used.
| Name | Type | Description |
| nWidth | number | The width of the column divided by 7 pixels. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
oWorksheet.GetRange("A1").SetColumnWidth(20);
builder.SaveFile("xlsx", "SetColumnWidth.xlsx");
builder.CloseFile();