我有一个非常有趣的困境,它让我头疼不已。我在这里看到过类似的问题,但是用户没有发布代码,所以没有得到解决。这是一个 asp.net、sql server 和 c# 应用程序。
在我的应用程序中,我使用 JavaScript 在 TextBox
中显示虚拟数据,以便在运行较长的进程时娱乐用户。 (请注意,这是一个项目,而不是专业的应用程序)。
问题是,一旦应用程序执行完毕,应用程序(我相信)会刷新页面并清除 TextBox
。我想防止这种情况发生,并在程序完成后继续显示文本。
我的问题是,以下代码中刷新页面的位置是什么?如何重新编码以防止文本被清除?
我知道 JavaScript 或 .aspx 页面没有问题。我没有设置或编程任何属性来清除文本。如果有人能阐明这个问题,我将不胜感激。如果您需要我提供更多代码,请告诉我。在问题解决之前,我将非常活跃地关注此页面。再次感谢!
public partial class SendOrders : System.Web.UI.Page
{
protected enum EDIType
{
Notes,
Details
}
protected static string NextBatchNum = "1";
protected static string FileNamePrefix = "";
protected static string OverBatchLimitStr = "Batch file limit has been reached. No more batches can be processed today.";
protected void Page_Load(object sender, EventArgs e)
{
Initialize();
}
protected void Page_PreRender(object sender, EventArgs e)
{ }
protected void btnExit_Click(object sender, EventArgs e)
{
System.Diagnostics.Process.GetCurrentProcess().Kill();
}
protected void Button_Click(object sender, EventArgs e)
{
PutFTPButton.Enabled = false;
Thread.Sleep(3000);
Button btn = (Button)sender;
KaplanFTP.BatchFiles bf = new KaplanFTP.BatchFiles();
KaplanFTP.Transmit transmit = new KaplanFTP.Transmit();
if (btn.ID == PutFTPButton.ID)
{
DirectoryInfo dir = new DirectoryInfo(@"C:\Kaplan");
FileInfo[] BatchFiles = bf.GetBatchFiles(dir);
bool result = transmit.UploadBatchFilesToFTP(BatchFiles);
if (!result)
{
ErrorLabel.Text += KaplanFTP.errorMsg;
return;
}
bf.InsertBatchDataIntoDatabase("CTL");
bf.InsertBatchDataIntoDatabase("HDR");
bf.InsertBatchDataIntoDatabase("DET");
bf.InsertBatchDataIntoDatabase("NTS");
List<FileInfo> allfiles = BatchFiles.ToList<FileInfo>();
allfiles.AddRange(dir.GetFiles("*.txt"));
bf.MoveFiles(allfiles);
foreach (string order in bf.OrdersSent)
{
OrdersSentDiv.Controls.Add(new LiteralControl(order + "<br />"));
}
btnExit.Visible = true;
OrdersSentDiv.Visible = true;
OrdersInfoDiv.Visible = false;
SuccessLabel.Visible = true;
NoBatchesToProcessLbl.Visible = true;
BatchesToProcessLbl.Visible = false;
PutFTPButton.Enabled = false;
BatchesCreatedLbl.Text = int.Parse(NextBatchNum).ToString();
Thread.Sleep(20000);
if (KaplanFTP.errorMsg.Length != 0)
{
ErrorLabel.Visible = false;
SuccessLabel.Visible = true;
ErrorLabel.Text = KaplanFTP.errorMsg;
}
}
}
private void Initialize()
{
KaplanFTP.BatchFiles bf = new KaplanFTP.BatchFiles();
if (!IsPostBack)
{
FileNamePrefix = bf.FileNamePrefix;
NextBatchNum = bf.NextBatchNum;
BatchesCreatedLbl.Text = (int.Parse(NextBatchNum) - 1).ToString();
if (bf.CheckLocalForNewBatch() == true)
{
NoBatchesToProcessLbl.Visible = false;
BatchesToProcessLbl.Visible = true;
if (int.Parse(NextBatchNum) >= 50)
{
ErrorLabel.Text += ErrorLabel.Text + OverBatchLimitStr;
ErrorLabel.Visible = true;
PutFTPButton.Enabled = false;
}
else
{
bf.ReadyFilesForTransmission();
ErrorLabel.Visible = false;
PutFTPButton.Enabled = true;
List<string[]> detStream = bf.GetBatchStream("DET");
List<string[]> hdrStream = bf.GetBatchStream("HDR");
OrdersInfoDiv.Visible = true;
DataTable dt = new DataTable();
dt.Columns.Add("ORDER NUMBER");
dt.Columns.Add("LINE NUMBER");
dt.Columns.Add("ITEM NUMBER/ISBN");
dt.Columns.Add("DESCRIPTION");
dt.Columns.Add("QUANTITY");
dt.Columns.Add("SHIPPING");
Dictionary<string, string> orderShip = new Dictionary<string, string>();
foreach (string[] hdrItems in hdrStream)
{
orderShip.Add(hdrItems[0], hdrItems[2]);
}
foreach (string[] detItems in detStream)
{
List<string> detLineList = new List<string>(detItems);
detLineList.Add(orderShip[detItems[0]]);
detLineList.RemoveAt(13);
detLineList.RemoveAt(12);
detLineList.RemoveAt(11);
detLineList.RemoveAt(10);
detLineList.RemoveAt(9);
detLineList.RemoveAt(8);
detLineList.RemoveAt(7);
detLineList.RemoveAt(4);
detLineList.RemoveAt(2);
detLineList[1] = detLineList[1].TrimStart('0');
detLineList[4] = detLineList[4].TrimStart('0');
dt.Rows.Add(detLineList.ToArray());
}
BatchDetails.DataSource = dt;
BatchDetails.DataBind();
}
}
else
{
NoBatchesToProcessLbl.Visible = true;
BatchesToProcessLbl.Visible = false;
PutFTPButton.Enabled = false;
}
}
}
}
最佳答案
是的。如果 IsPostBack 为真,您将必须确定计算状态并在 Page_Load 内填充控件:
protected void Page_Load(object sender, EventArgs e) {
if (IsPostBack) {
// re-populate javascript-fill UI
} else {
}
Initialize();
}
您也可以将 Initialize() 移动到 else 子句中。
关于c# - 如何防止我的文本框在回发时清除文本。,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8011555/