DataTable的一個簡單的擴展

我們在調試代碼的時候經常遇到DataTable的數據類型錯誤,這個類可以幫助我們很快查看DataTable的結構信息.

 1 /// <summary>
 2 /// DataTable擴展類
 3 /// </summary>
 4 public static class DataTableExtensions
 5 {
 6     /// <summary>
 7     /// 顯示DataTable的結構信息
 8     /// </summary>
 9     /// <param name="table">datatable</param>
10     public static void LoadDataTableStructure(this DataTable table)
11     {
12         if (table == null)
13         {
14             System.Diagnostics.Debug.WriteLine("datatable is null.");
15         }
16 
17         StringBuilder structureInfo = new StringBuilder();
18         string colName = string.Empty;
19         string colType = string.Empty;
20 
21         structureInfo.AppendLine("============================Begin=============================");
22         structureInfo.AppendLine("TableName: " + table.TableName);
23         structureInfo.AppendLine(string.Format("{0,-20}{1}", "ColumnName", "DataType"));
24 
25         foreach (DataColumn col in table.Columns)
26         {
27             colName = col.ColumnName;
28             colType = col.DataType.ToString();
29             structureInfo.AppendLine(string.Format("{0,-20}{1}", colName, colType));
30         }
31            
32         structureInfo.AppendLine("=============================End==============================");
33         System.Diagnostics.Debug.WriteLine(structureInfo.ToString());
34     }
35 }