我已经研究了这里的其他答案,但没有一个真正适合我的情况。我已经在数据库中添加了一个表,但现在出现此错误。事情是,它在别人的电脑上工作,但在我的电脑上,我收到以下错误。附:我的连接很好(以防你走神):
IndexOutOfRangeException
未被用户代码处理
An exception of type `System.IndexOutOfRangeException` occurred in System.Data.dll but was not handled in user code
Additional information: Cannot find table 0.
有问题的代码是在 for 循环中初始化 int i = 0
这是我的代码
protected void Page_Load(object sender, EventArgs e)
{
DataSet ds = new DataSet();
string strSQLconnection = "Data Source=LOTUS;Initial Catalog=PMRS;Integrated Security=True";
SqlConnection sqlConn = new SqlConnection(strSQLconnection);
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "select * from PMRS.dbo.BOARDMEMBERS order by ORDERID";
cmd.CommandType = CommandType.Text;
cmd.Connection = sqlConn;
SqlDataAdapter sa = new SqlDataAdapter();
try
{
sqlConn.Open();
sa.SelectCommand = cmd;
sa.Fill(ds);
int rCount = ds.Tables[0].Rows.Count;
}
catch (Exception ex)
{
Response.Write(ex);
sqlConn.Close();
sqlConn.Dispose();
}
finally
{
sqlConn.Close();
sqlConn.Dispose();
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
if (ds.Tables[0].Rows[i]["ID"].ToString() != "2")
{
sb.Append("<div class=\" col-md-6 \">");
sb.Append("<img src=\"../images/board/" + ds.Tables[0].Rows[i]["IMAGE"].ToString() + "\" /> ");
sb.Append("<h3>" + ds.Tables[0].Rows[i]["TITLE"].ToString() + "</h3> ");
sb.Append("<h4>" + ds.Tables[0].Rows[i]["FNAME"].ToString() + " " + ds.Tables[0].Rows[i]["MI"].ToString() + " " + ds.Tables[0].Rows[i]["LNAME"].ToString() + "</h4>");
sb.Append("<p>" + ds.Tables[0].Rows[i]["BIO"].ToString() + "</p> ");
sb.Append("<p>" + ds.Tables[0].Rows[i]["SUFFIX_PREFIX"].ToString() + "</p> ");
sb.Append("</div>");
}
}
Literal1.Text = sb.ToString();
}
我是一名前端开发人员,再次接触服务器端编程,在这里对我来说很轻松。给宝宝解释一下。哈哈谢谢
最佳答案
您收到错误是因为您试图访问 ds.Tables[0]
,但 ds.Tables
没有任何元素。在访问 ds.Tables[0]
之前,您必须检查 ds.Tables
是否为 null 以及 ds.Tables
是否有任何元素
StringBuilder sb = new StringBuilder();
if (ds.Tables != null && ds.Tables.Count > 0)
{
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
....
}
Literal1.Text = sb.ToString();
}
else
{
// do something when ds.Tables is null or ds.Tables doesn't have any elements
}
关于c# - 用户代码在 for 循环中未处理 IndexOutOfRangeException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27476944/