我正在尝试使用每个表中的文本框和按钮动态构建表。这些表已成功添加，但是当我按下按钮时，它会回发到页面并且表格已经消失。所以我在updatePanel中构建了每个表，但是当一个按钮被点击两次时，又发生了一次回发。我怎样才能防止这种反叛呢？然后，我如何获取文本框内的值？ TNX非常多！
private void addTable(List<fileSaving> fs)
{
foreach (fileSaving f in fs){
UpdatePanel up = new UpdatePanel();
up.ID = "UpdatePanel-"+f.FileName;
up.UpdateMode = UpdatePanelUpdateMode.Conditional;
Table T = new Table();
T.CssClass = "filesTBL";
TableRow hTR = new TableRow();
TableCell td1 = new TableCell();
Image fileImg = new Image();
fileImg.ImageUrl = "images/"+f.FileExtension+".png";
td1.Controls.Add(fileImg);
hTR.Cells.Add(td1);
TableCell td2 = new TableCell();
td2.Text = f.ExpName;
hTR.Cells.Add(td2);
TableCell td3 = new TableCell();
Image expImg = new Image();
expImg.ImageUrl = "images/magnet.png";
td3.Controls.Add(expImg);
hTR.Cells.Add(td3);
T.Rows.Add(hTR);
TableRow mTR = new TableRow();
TableCell td4 = new TableCell();
td4.Text = "";
mTR.Cells.Add(td4);
TableCell td5 = new TableCell();
td5.Text = f.TeamID.ToString();
mTR.Cells.Add(td5);
TableCell td6 = new TableCell();
Image teamImg = new Image();
teamImg.ImageUrl = "images/team3.png";
td6.Controls.Add(teamImg);
mTR.Cells.Add(td6);
T.Rows.Add(mTR);
TableRow lTR = new TableRow();
TableCell td7 = new TableCell();
HyperLink downloadLink = new HyperLink();
downloadLink.Attributes.Add("href", "http://proj.ruppin.ac.il/igroup39/test2/tar5/tar5.zip");
downloadLink.ImageUrl = "images/download2.png";
downloadLink.ToolTip = "לחץ להורדה";
td7.Controls.Add(downloadLink);
lTR.Cells.Add(td7);
TableCell td8 = new TableCell();
if (f.ReportGrade != -1)
{
td8.Text = f.ReportGrade.ToString();
}
else
{
TextBox tb = new TextBox();
tb.ID = f.FileName + "-tb";
gFN = tb.ID;
tb.Width = 40;
td8.Controls.Add(tb);
Button btn = new Button();
btn.ID = f.FileName + "-btn";
btn.Text = "הזן ציון";
btn.Click += new EventHandler(btn_Click);
td8.Controls.Add(btn);
}
lTR.Cells.Add(td8);
TableCell td9 = new TableCell();
Image gradeImg = new Image();
gradeImg.ImageUrl = "images/grade.png";
td9.Controls.Add(gradeImg);
lTR.Cells.Add(td9);
T.Rows.Add(lTR);
up.ContentTemplateContainer.Controls.Add(T);
Page.Form.Controls.Add(up);
}
}
protected void btn_Click(object sender, EventArgs e)
{
if (!IsPostBack)
{
Button mybtn = (Button)sender;
Response.Write(mybtn.ID);
}
}
答案 0 :(得分：0)
所以经过很长一段时间思考如何解决这个问题，在一些朋友的帮助下，我在page_load写了这个，所以当按下按钮并发生回发时，页面重建了我的动态控件，但只有按下按钮 - 这是session的作用。
我的新代码：
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
if (Session["showFiles"] != null)
{
bool flag = (bool)Session["showFiles"];
if (flag == true)
{
fileSaving fs = new fileSaving();
List<fileSaving> fileslist = fs.filesList(hiddenLBL.Text);
addTable(fileslist);
}
}
}
ExpScheduleClass ESCC = new ExpScheduleClass();
List<string> labCourses = ESCC.getCourseList();
// dynamically create a dropdown list (aka DDL)
DDLCourses = new DropDownList();
DDLCourses.DataSource = labCourses; // set the data source
DDLCourses.DataBind(); // bind the data to the DDL control
DDLCourses.AutoPostBack = true;
DDLCourses.SelectedIndexChanged += DDLCourses_SelectedIndexChanged;
coursePH.Controls.Add(DDLCourses);
}
private void DDLCourses_SelectedIndexChanged(object sender, EventArgs e)
{
string[] coursesIDArr = DDLCourses.SelectedValue.Split(' ');
/* courseLBL.Text = coursesIDArr[0];
string courseID = coursesIDArr[0];//take the id from the list*/
courseLBL.Text = coursesIDArr[2];
classLBL.Text = coursesIDArr[4];
currnetYearLBL.Text = coursesIDArr[6];
semesterLBL.Text = coursesIDArr[8];
courseLBL.ForeColor = System.Drawing.Color.Black;
currnetYearLBL.ForeColor = System.Drawing.Color.Black;
semesterLBL.ForeColor = System.Drawing.Color.Black;
classLBL.ForeColor = System.Drawing.Color.Black;
ExpScheduleClass SIEGL = new ExpScheduleClass();
List<String> lessonsList = SIEGL.getLessonList(coursesIDArr[2]);
DDLLessons.DataSource = lessonsList; // set the data source
DDLLessons.DataBind();
}
protected void DDLLessons_SelectedIndexChanged(object sender, EventArgs e)
{
string[] lessonsIdArr = DDLLessons.SelectedValue.Split(' ');
string lessonID = lessonsIdArr[0];
lessonLBL.Text = lessonID;
dateLBL.Text = lessonsIdArr[1];
lessonLBL.ForeColor = System.Drawing.Color.Black;
hiddenLBL.Text = lessonID;
fileSaving fs = new fileSaving();
List<fileSaving> fileslist = fs.filesList(lessonID);
addTable(fileslist);
Session["showFiles"] = true;
}
private void addTable(List<fileSaving> fs)
{
foreach (fileSaving f in fs)
{
UpdatePanel up = new UpdatePanel();
up.ID = "UpdatePanel-" + f.FileName;
up.UpdateMode = UpdatePanelUpdateMode.Conditional;
Table T = new Table();
T.CssClass = "filesTBL";
//------------Header Row------------------------------------------------
TableRow hTR = new TableRow();
TableCell td1 = new TableCell();
Image fileImg = new Image();
fileImg.ImageUrl = "images/" + f.FileExtension + ".png";
td1.Controls.Add(fileImg);
hTR.Cells.Add(td1);
TableCell td2 = new TableCell();
td2.Text = f.ExpName;
hTR.Cells.Add(td2);
TableCell td3 = new TableCell();
Image expImg = new Image();
expImg.ImageUrl = "images/magnet.png";
td3.Controls.Add(expImg);
hTR.Cells.Add(td3);
T.Rows.Add(hTR);
//------------Middle Row------------------------------------------------
TableRow mTR = new TableRow();
TableCell td4 = new TableCell();
td4.Text = "";
mTR.Cells.Add(td4);
TableCell td5 = new TableCell();
td5.Text = f.TeamID.ToString();
mTR.Cells.Add(td5);
TableCell td6 = new TableCell();
Image teamImg = new Image();
teamImg.ImageUrl = "images/team3.png";
td6.Controls.Add(teamImg);
mTR.Cells.Add(td6);
T.Rows.Add(mTR);
//------------Last Row------------------------------------------------
TableRow lTR = new TableRow();
TableCell td7 = new TableCell();
HyperLink downloadLink = new HyperLink();
//downloadLink.Attributes.Add("href", "/igroup39/test2/project/reportFiles/" + f.FileName);
downloadLink.Attributes.Add("href", "http://proj.ruppin.ac.il/igroup39/test2/tar5/tar5.zip");
downloadLink.ImageUrl = "images/download2.png";
downloadLink.ToolTip = "לחץ להורדה";
td7.Controls.Add(downloadLink);
lTR.Cells.Add(td7);
TableCell td8 = new TableCell();
if (f.ReportGrade != -1)
{
td8.Text = f.ReportGrade.ToString();
}
else
{
TextBox tb = new TextBox();
tb.ID = f.FileName + "-tb";
gFN = tb.ID;
tb.Width = 40;
td8.Controls.Add(tb);
Button btn = new Button();
btn.ID = f.FileName + "-btn";
btn.Text = "הזן ציון";
btn.Click += new EventHandler(btn_Click);
td8.Controls.Add(btn);
}
lTR.Cells.Add(td8);
TableCell td9 = new TableCell();
Image gradeImg = new Image();
gradeImg.ImageUrl = "images/grade.png";
td9.Controls.Add(gradeImg);
lTR.Cells.Add(td9);
T.Rows.Add(lTR);
up.ContentTemplateContainer.Controls.Add(T);
Page.Form.Controls.Add(up);
//filesTablesPH.Controls.Add(up);
}
}
protected void btn_Click(object sender, EventArgs e)
{
Button mybtn = (Button)sender;
string btnID = mybtn.ID;
string[] file_Name = btnID.Split('-');
string tbID = file_Name[0] + "-tb";
string grade = ((TextBox)filesTablesPH.FindControl(tbID)).Text;
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert("+grade+")", true);
}