DataTable的一个简单的扩展

我们在调试代码的时候经常遇到DataTable的数据类型错误,这个类可以帮助我们很快查看DataTable的结构信息.

/// <summary>
/// DataTable扩展类
/// </summary>
public static class DataTableExtensions
{
    /// <summary>
    /// 显示DataTable的结构信息
    /// </summary>
    /// <param name="table">datatable</param>
    public static void LoadDataTableStructure(this DataTable table)
    {
        if (table == null)
        {
            System.Diagnostics.Debug.WriteLine("datatable is null.");
        }

        StringBuilder structureInfo = new StringBuilder();
        string colName = string.Empty;
        string colType = string.Empty;

        structureInfo.AppendLine("============================Begin=============================");
        structureInfo.AppendLine("TableName: " + table.TableName);
        structureInfo.AppendLine(string.Format("{0,-20}{1}", "ColumnName", "DataType"));

        foreach (DataColumn col in table.Columns)
        {
            colName = col.ColumnName;
            colType = col.DataType.ToString();
            structureInfo.AppendLine(string.Format("{0,-20}{1}", colName, colType));
        }
           
        structureInfo.AppendLine("=============================End==============================");
        System.Diagnostics.Debug.WriteLine(structureInfo.ToString());
    }
}