Question

我有一个返回3个表的存储过程。我关心填充List的所有内容都是存储过程返回的最后一个表的结果集;它有3列。到目前为止，我有以下代码：

string connStr = null;
SqlConnection scnn;
SqlCommand sCmd;
string sql = null;

connStr = "Data Source=server;Initial Catalog=dbName;Integrated Security=SSPI";
sql = @"DECLARE @udt1 userDefTblType1;" +
       "INSERT INTO @one (uid) VALUES (0), (1), (2), (3);" +
       "DECLARE @udt2 userDefTblType2;" +
       "INSERT INTO @two (uid) VALUES (0);" +
       "DECLARE @udt3 userDefTblType3;" +
       "INSERT INTO @three (uid) VALUES (0),(1);" +
       "EXEC [dbo].[storedProcedure] @one, @two, @three;";

sqlCnn = new SqlConnection(connStr);

try
{
    sCnn.Open();
    sCmd = new SqlCommand(sql, sCnn);
    SqlDataReader sReader = sCmd.ExecuteReader();

    sReader.Read();
    sReader.NextResult(); //move to next table

    sReader.Read();
    sReader.NextResult(); //move to next table

    sReader.Read();  //table of interest
    List<decimal> results = new List<decimal>();
    while (sReader.Read())
    {
        results.Items.Add(sqlReader["column1"].ToString());  //my problem is here
        results.Items.Add(sqlReader["column2"].ToString());  //my problem is here
        results.Items.Add(sqlReader["column2"].ToString());  //my problem is here                
    };

    sqlReader.Close();
    sqlCmd.Dispose();
    sqlCnn.Close();
}

catch (Exception ex)
{
    MessageBox.Show("Can not open connection ! ");
}

我需要分别填写list1，column2，column3这样的列表，因为我可以填充HTML表格。

请你告诉我我做错了什么;我采取了正确的方法吗？

谢谢（我开始在C＃中取得更多进展，我做了更多的db dev）

修改

以下是存储过程返回的第3个表的示例：

Column1 | Column2 | Column3
---------------------------
5.6     | 5.1     | 7.4    |
5.7     | 5.4     | 7.7    |
5.8     | 5.6     | 7.9    |
5.9     | 5.8     | 7.0    |
5.1     | 5.6     | 7.7    |

我已经为html表动态编写了代码。我只需要将这些结果存储在枚举它们的位置，这样就可以将值添加到我的代码中的相对html选项卡中。

修改

最后，我希望我的代码看起来像这样：

html.WriteLine("<tr>");
while (colCount <= numCol)
{
html.WriteLine("<td>" POSITION IN <LIST> + "</td>");
cFinalColCount++;
}
html.WriteLine("</tr>");
rowCount++;

Answer 1

使用gridview在html中制作数据。它比构建自己的表容易得多。

C＃代码：

DataTable dt = new DataTable();
try
{
    sCnn.Open();
    sCmd = new SqlCommand(sql, sCnn);
    SqlDataReader sReader = sCmd.ExecuteReader();

    sReader.Read();
    sReader.NextResult(); //move to next table

    sReader.Read();
    sReader.NextResult(); //move to next table

    dt.Load(sReader); // Convert your data reader to a DataTable

    sqlReader.Close();
    sqlCmd.Dispose();
    sqlCnn.Close();


    // UNTESTED CODE - but it should be close. 

    GridView gv = new GridView(); // create gridview
    gv.DataSource = dt; // Set the DataTable as the DataSource for the GridView
    gv.DataBind(); // Bind the Data to the GridView
    StringWriter sWriter = new StringWriter(); //stringwriter needed for html writer
    HtmlTextWriter htWriter = new HtmlTextWriter(sWriter); // create HthmWriter
    gv.RenderControl(htWriter); //render the gridview in the htmlwriter
    htWriter.Write(true); // write the html writer to the output stream

}

catch (Exception ex)
{
    MessageBox.Show("Can not open connection ! ");
}

Answer 2

As JonSkeet suggested，最有意义的是声明一个带有三位小数的类作为属性（最好有合理的名称，如下所示）：

public class Volume
{
  public decimal Length { get; set; }
  public decimal Width { get; set; }
  public decimal Height { get; set; }
}

然后，您将创建List个Volume个对象：

List<Volume> results = new List<Volume>();
while (sReader.Read())
{
  // Error checking elided
  var length = decimal.Parse(sqlReader["column1"]);
  var width = decimal.Parse(sqlReader["column2"]);
  var height = decimal.Parse(sqlReader["column3"]);
  results.Add(new Volume { Length = length, Width = width, Height = height });
};

使用返回多个表的存储过程中的表的结果填充c＃list

2 个答案: