You can configure the wijgrid columns individually by specifying a 'columns' option that contains an array with options for each column, like in this code sample.

$("#demo").wijgrid({
    /* bind data */
    data: salesData,

    /* configure grid */
    allowEditing: true,
    highlightCurrentCell: true,

    /* configure grid columns */
    columns: [
        {readOnly: true}, /* first column is read-only */
        {dataType:'number', dataFormatString:'n0'} /* second column is numeric */
    ]
});

The options available for the columns are described in the Wijmo API documentation under IColumn.

Particularly useful column options include:

• allowMoving: Specifies whether you can drag the column with the mouse to a new position.
• allowSizing: Specifies whether you can resize the column with the mouse.
• headerText: Specifies text to show on the column header.
• allowSort: Specifies whether you can sort the column by clicking the header with the mouse.
• dataType: Specifies the type of data that the column contains (also governs content alignment).
• dataFormatString: Specifies the format string used to format the data in the column.
• readOnly: Specifies whether you can edit cells in this column.
• valueRequired: Specifies whether to accept null values when you edit cells in this column.