小编Akr*_*hda的帖子

登录时,我将用户名保存到Session["username"].在下一页,我正在进行Web服务调用.在Web服务中,我想访问此会话.

这该怎么做？

我甚EnableSession至尝试过将webmethod 设置为true.但是,仍在执行时Session["username"],显示实例设置为null异常.

请帮忙.

我正在使用c#更新sql server 2008数据库,如下所示:

foreach (DataRow row in dt.Rows)
{
    faxstatus = row.ItemArray[5].ToString().Contains("0000") ? "Faxed" : "Error";

    query = 
        @"update FileLog set
        FaxStatus=" + "'" + faxstatus + "'," +
        "FaxedPageCount=" + "'" + row.ItemArray[1] + "'," +
        "dtFaxed=" + "'" + row.ItemArray[2] + "'," +
        "BiscomCode=" + "'" + row.ItemArray[5] + "', " +
        "RetryCount=" + "'" + row.ItemArray[4] + "' " +
        "where CONVERT(VARCHAR(255), JobID) =" + "'" + row.ItemArray[3] + "'" +
        " and FaxStatus<>'Faxed'";

    command = new …

for (int i = 0; i < form2.dataGridView1.Rows.Count; i++)
{                  

    if ( form2.dataGridView2.Rows[i].Cells[0].Value != null && 
         (bool) form2.dataGridView2.Rows[i].Cells[0].Value == true )
    {
        form2.dataGridView2.Rows.Add();
        for (int j = 1; j < form2.dataGridView1.Columns.Count; j++)
            form2.dataGridView2.Rows[i].Cells[j].Value = 
                form2.dataGridView1.Rows[i].Cells[j].Value;

    }

}  

上面的代码没有给出任何结果.请告诉我如何将一个datagridview的数据复制到另一个？

SqlConnection conn = new SqlConnection("Server=ILLUMINATI;" + 
    "Database=DB;Integrated Security= true");
SqlCommand comm = new SqlCommand(
    "Insert into FileUpload ('FilePath','TypeId','UploadedBy','UploadedDate') 
    values (" + savePath + "," + typeid + "," + NAME + "," + DateTime.Now+ ")", conn);

conn.Open();
comm.ExecuteNonQuery();
conn.Close();

它给出了一个错误说:

{"'C'附近的语法不正确."}

请有人告诉我错误.

我有:

<asp:RadioButtonList ID="selectedYesNoQuestionBlock7" runat="server" 
    RepeatDirection="Horizontal" OnSelectedIndexChanged="Question7GotAnswered">
    <asp:ListItem Text="Yes" Value="1"></asp:ListItem>
    <asp:ListItem Text="No" Value="0"></asp:ListItem>
</asp:RadioButtonList>

....

<div id="btCreate" style="margin-left: 254px; margin-top: 10px;">
    <asp:Button runat="server" Text="Categorize" ID="btCategorize" />
</div>

我想在选择列表项后提交wothout按钮.它有可能吗？

我正在使用linq到xml.

在这里我们加载xml文件为XDocument.Load("filename.xml").

这是什么XDocument？

我有一个DateTime实例,我从我的数据库中获取,我想从中减去它,DateTime.Now并找出是否通过了4个小时.我怎么做？

我应该什么时候使用DateTime.UTCNow或DateTimeOffset