0

假设 cardDetailsID 为 5。

查看数据库的cardDetails表中的第5条记录，可以看到它的其他字段包括“bgcolour”和“borderstyle”。因此，对于这个特定的记录，我有 cardDetailsID = 5、bgcolour = blue、bordersytle=solid。

我希望能够从cardDetailsID 中获取bgcolour 和bordersyle 设置（蓝色和纯色）。

这是到目前为止的代码。查询字符串中的值正在工作（正在传递数字“5”）但现在我如何获得该行的其余设置？

    cardDetailsIDrv.Text = Request.QueryString["cardDetailsID"];
    cardDetailsIDrv.Visible = false;

    //create Connection
    SqlConnection myConnection = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]);


    //create Command
    SqlCommand getCardDetailsCMD = new SqlCommand("SELECT * FROM cardDetails WHERE cardDetailsID =" + Convert.ToInt32(cardDetailsIDrv.Text), myConnection);
    myConnection.Open();

    //create datareader
    SqlDataReader myReader = getCardDetailsCMD.ExecuteReader();

    //code works properly up till here


    try
    {
        //Using DataReader to retrieve info from the database and display it on the panel

        while (myReader.Read())
        { 
           //I'm guessing here is where I'm messing things up
           pnlCardps.BackColor = Color.FromName(myReader["bgcolour"].ToString());
           pnlCardps.BorderStyle = (BorderStyle)Enum.Parse(typeof(BorderStyle), myReader["borderstyle"].ToString());

        }
    }

    finally
    {
        if (myReader != null)
        {
            myReader.Close();
        }

        if (myConnection != null)
        {
            myConnection.Close();
        }
    }

问题解决了！！我所要做的就是将 while 循环中的代码调整为：

string bgColour = myReader["bgColour"].ToString();
pnlCardrv.BackColor = Color.FromName(bgColour);

string borderColour = myReader["borderColour"].ToString();
pnlCardrv.BorderColor = Color.FromName(borderColour);
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2 回答 2

1

首先，您必须获取detailsID通过查询字符串传递的内容，然后执行查询。

int id;
if(int.TryParse(Request.QueryString["detailsID"],out id))
{

string sql= string.Format("select .. from .. where id={0}",id);// using SqlParameter is much better and secure
// and execute your query and fetch the data reader
while(reader.Read())
{
 // bla bla bla
}
}
于 2012-05-15T20:18:54.387 回答
0

Request.QueryString["detailsID"]将为您获取查询字符串变量的值。

if (Request.QueryString("detailsID") == null || Request.QueryString("detailsID").Length <= 0 || !int.TryParse(Request.QueryString("detailsID"), out detailsID) || MessageThreadID <= 0)
{
    //This is my standard exception, but you can handle it how you want.
    throw new Exception("Error: unable to load detailsID.  Request.QueryString.count: " + Request.QueryString.Count + " Request.QueryString(\"detailsID\"): " + Request.QueryString("detailsID"));
}
于 2012-05-15T20:15:02.603 回答