我正在使用 Denis Bauer 的 DynamicControlsPlaceholder 在回发后保存动态控件的视图状态。我之前在项目的早期部分中使用过 DynamicControlsPlaceholder，它运行良好。
然而，今天我遇到了困难。我创建了一个页面，其中有许多文本标签、滑块和文本框（由数据库中有多少元素定义），如下所示。滑块是 JuiceUI 滑块控件，文本框是普通的 ASP.NET 文本框。
回发后，文本标签（文字控件）和饼图消失，文本框缩小（内部文本保留），滑块重置为最低值，无法移动滑块（滑块根本无法移动）。
我对 ASP.NET 很陌生，我完全不知道为什么会这样。您认为这是动态控件占位符、JuiceUI 滑块还是我的代码（见下文）的问题？
{
SqlCeCommand cmdb = new SqlCeCommand();
cmdb.CommandText = "SELECT CriteriaName,CriteriaDesc FROM tblCriteria WHERE (DecisionID = @DID)";
cmdb.Parameters.AddWithValue("@DID", DID.Text.Trim());
cmdb.Connection = sqlConnection1;
reader = cmdb.ExecuteReader();
string[] criterianames = new string[critno];
string[] criteriadescs = new string[critno];
int i = 0;
while (reader.Read())
{
criterianames[i] = reader["CriteriaName"].ToString().Trim();
criteriadescs[i] = reader["CriteriaDesc"].ToString().Trim();
i++;
}
reader.Close();
Cont2.Controls.Add(new LiteralControl("<h3>Thank you for contributing to the following decision.<h4>Decision Goal: " + dgoal + "</h4><br><br><center>"));
Series weights = new Series();
weights.ChartType = SeriesChartType.Pie;
double[] yBar = new double[critno];
string[] xBar = new string[critno];
xBar = criterianames;
for (i = 0; i < critno; i++)
{
yBar[i] = 1;
}
ChartArea ca = new ChartArea();
ca.Position = new ElementPosition(0, 0, 100, 100);
ca.InnerPlotPosition = new ElementPosition(0, 0, 100, 100);
ca.BackColor = System.Drawing.Color.Transparent;
Chart piechart = new Chart();
piechart.RenderType = RenderType.ImageTag;
piechart.ChartAreas.Add(ca);
piechart.BackColor = System.Drawing.Color.Transparent;
piechart.Palette= ChartColorPalette.BrightPastel;
piechart.BorderColor = System.Drawing.Color.Black;
piechart.BorderSkin.PageColor = System.Drawing.Color.Transparent;
piechart.BorderSkin.BackColor = System.Drawing.Color.Transparent;
piechart.Width = 800;
piechart.Series.Add(weights);
piechart.ImageStorageMode = ImageStorageMode.UseImageLocation;
piechart.ImageLocation = "~/TempImages/ChartPic_#SEQ(300,3)";
piechart.Series[0].Points.DataBindXY(xBar, yBar);
piechart.DataBind();
Cont2.Controls.Add(piechart);
Cont2.Controls.Add(new LiteralControl("</center><h3>Please provide a weighting for each criterion.</h3><p>Please provide a weighting for each criterion along with a description of why you made this choice. </p>"));
for (i = 0; i < critno; i++)
{
Cont3.Controls.Add(new LiteralControl("<h3>" + criterianames[i] + "</h3><p><strong>Description: </strong>" + criteriadescs[i] + "</p><center>"));
Juice.Slider weightslider = new Juice.Slider();
weightslider.ID = "w" + i.ToString();
weightslider.Min = 1;
weightslider.Value = 50;
weightslider.Max = 100;
weightslider.AutoPostBack = true;
Cont3.Controls.Add(weightslider);
weightslider.ValueChanged += (o, a) =>
{
ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + weightslider.Value.ToString() + "');", true);
};
TextBox wdesc = new TextBox();
wdesc.ID = "wd" + Convert.ToString(i);
wdesc.Rows = 3;
wdesc.Width = 900;
wdesc.TextMode = TextBoxMode.MultiLine;
Cont3.Controls.Add(wdesc);
Cont3.Controls.Add(new LiteralControl("</center>"));
}
Cont3.Controls.Add(new LiteralControl("<p align='right'>"));
Button continue1 = new Button();
continue1.Text = "Continue";
Cont3.Controls.Add(continue1);
Cont3.Controls.Add(new LiteralControl("</p>"));
// Database Disconnect
sqlConnection1.Close();
}
非常感谢您提供的任何帮助，亲切的问候，理查德