如何从code动态添加Repeater控件的背后？ [英] How to add Repeater control dynamically from code behind?
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问题描述
我有一个创建表，然后之后创建一个中继器，表被渲染，但中继只是没有得到渲染的方法。下面先简单创建一个表，以信息填充它的方法，然后动态地构造，工作正常的中继器，但它只是不呈现中继到aspx页面。我已经使用StringBuilder它返回一个字符串尝试，但仍然无法正常工作。这里是低于code。谢谢
私人无效CreateUserExperienceTable（列表＆LT; UserExperience＆GT;的经历）
{
的foreach（在经历UserExperience经验）
{
HtmlGenericControl标题=新HtmlGenericControl（H3）;
Header.InnerHtml = experience.Company;
dvUserExperience.Controls.Add（头）; 表experienceTable =新表（）; 的TableRow experienceRoleRow =新的TableRow（）;
的TableRow experienceDescriptionRow =新的TableRow（）;
的TableRow experiencePeriodFromRow =新的TableRow（）;
的TableRow experiencePeriodToRow =新的TableRow（）; TableCell的experienceRoleTitleCell =新的TableCell（）;
TableCell的experienceRoleValueCell =新的TableCell（）;
TableCell的experienceDescriptionTitleCell =新的TableCell（）;
TableCell的experienceDescriptionValueCell =新的TableCell（）;
TableCell的experiencePeriodFromTitleCell =新的TableCell（）;
TableCell的experiencePeriodFromValueCell =新的TableCell（）;
TableCell的experiencePeriodToTitleCell =新的TableCell（）;
TableCell的experiencePeriodToValueCell =新的TableCell（）; experienceRoleTitleCell.Text =角色;
experienceRoleValueCell.Text = experience.Role;
experienceDescriptionTitleCell.Text =描述：
experienceDescriptionValueCell.Text = experience.CompanyDescription;
experiencePeriodFromTitleCell.Text =期间：从;
experiencePeriodFromValueCell.Text = experience.PeriodFrom.ToString（YY-MM-DD）;
experiencePeriodToTitleCell.Text =期间;
experiencePeriodToValueCell.Text = experience.PeriodTo == NULL
？ present
：experience.PeriodTo.ToString（）; experienceRoleRow.Cells.Add（experienceRoleTitleCell）;
experienceRoleRow.Cells.Add（experienceRoleValueCell）;
experienceDescriptionRow.Cells.Add（experienceDescriptionTitleCell）;
experienceDescriptionRow.Cells.Add（experienceDescriptionValueCell）;
experiencePeriodFromRow.Cells.Add（experiencePeriodFromTitleCell）;
experiencePeriodFromRow.Cells.Add（experiencePeriodFromValueCell）;
experiencePeriodToRow.Cells.Add（experiencePeriodToTitleCell）;
experiencePeriodToRow.Cells.Add（experiencePeriodToValueCell）; experienceTable.Rows.Add（experienceRoleRow）;
experienceTable.Rows.Add（experienceDescriptionRow）;
experienceTable.Rows.Add（experiencePeriodFromRow）;
experienceTable.Rows.Add（experiencePeriodToRow）; dvUserExperience.Controls.Add（experienceTable）; 字符串rptDuties = updatePageWithDuties（experience.Duties）;
//dvUserExperience.Controls.Add(rptDuties）;
}
} 私人字符串updatePageWithDuties（列表＆LT; ExperienceDuties＆GT;清单）
{
直放站rptDuties =新的Repeater（）;
rptDuties.DataSource =清单;
rptDuties.DataBind（）; 的foreach（的RepeaterItem rptItem在rptDuties.Items）
{
如果（rptItem.ItemIndex == 0）
{
的RepeaterItem HeaderTemplate中=新的RepeaterItem（rptItem.ItemIndex，ListItemType.Header）;
HtmlGenericControl h4Tag =新HtmlGenericControl（H4）;
h4Tag.InnerHtml =义务;
headerTemplate.Controls.Add（h4Tag）;
} 的RepeaterItem的ItemTemplate =新的RepeaterItem（rptItem.ItemIndex，ListItemType.Item）;
标签dutyLabel =新的Label（）;
ExperienceDuties expDuties =（（IList的＆所述; ExperienceDuties＆GT）rptDuties.DataSource）[rptItem.ItemIndex];
dutyLabel.Text = expDuties.Description;
itemTemplate.Controls.Add（dutyLabel）; 的RepeaterItem seperatorItem =新的RepeaterItem（rptItem.ItemIndex，ListItemType.Separator）;
LiteralControl ltrHR =新LiteralControl（）;
ltrHR.Text =＆LT;小时/＆gt;中;
seperatorItem.Controls.Add（ltrHR）;
} StringBuilder的SB =新的StringBuilder（）;
StringWriter的SW =新的StringWriter（某人）;
HtmlTextWriter的作家=新的HtmlTextWriter（SW）; rptDuties.RenderControl（作家）;
返回sb.ToString（）;
}
解决方案
您不能呈现的转发控制作为一个字符串。相反，你需要在转发添加到 dvUserExperience 作为对照。
私人无效CreateUserExperienceTable（列表＆LT; UserExperience＆GT;的经历）
{
的foreach（在经历UserExperience经验）
{
... dvUserExperience.Controls.Add（experienceTable）; //添加作为服务器控件
直放站rptDuties = updatePageWithDuties（experience.Duties）;
dvUserExperience.Controls.Add（rptDuties）;
}
}私人直放站updatePageWithDuties（列表＆LT; ExperienceDuties＆GT;清单）
{
直放站rptDuties =新的Repeater（）;
... 返回rptDuties;
}
更新：
您需要将控件添加到的RepeaterItem 是 rptItem 。
请参阅箭头＆LT; ===== 在以下code
私人直放站updatePageWithDuties（列表＆LT; ExperienceDuties＆GT;清单）
{
直放站rptDuties =新的Repeater（）;
rptDuties.DataSource =清单;
rptDuties.DataBind（）; 的foreach（的RepeaterItem rptItem在rptDuties.Items）
{
如果（rptItem.ItemIndex == 0）
{
VAR h4Tag =新HtmlGenericControl（H4）;
h4Tag.InnerHtml =义务;
rptItem.Controls.Add（h4Tag）; ＆LT; =====
} VAR dutyLabel =新的Label（）;
ExperienceDuties expDuties =
（（IList的＆LT; ExperienceDuties＆GT;）rptDuties.DataSource）rptItem.ItemIndex];
dutyLabel.Text = expDuties.Description;
rptItem.Controls.Add（dutyLabel）; ＆LT; ===== VAR ltrHR =新LiteralControl（）;
ltrHR.Text =＆LT;小时/＆gt;中;
rptItem.Controls.Add（ltrHR）; ＆LT; =====
} 返回rptDuties;
}
I have a method that creates table and then creates a repeater right after, the table gets rendered but the repeater just does not get rendered. The method below simply creates a table first, filling it with information then dynamically constructs a repeater which works fine, but then it just does not render the repeater onto the aspx page. I have tried using the stringbuilder to return it as a string but still doesn't work. here is the code below. Thanks
private void CreateUserExperienceTable(List<UserExperience> experiences)
{
foreach (UserExperience experience in experiences)
{
HtmlGenericControl Header = new HtmlGenericControl("h3");
Header.InnerHtml = experience.Company;
dvUserExperience.Controls.Add(Header);
Table experienceTable = new Table();
TableRow experienceRoleRow = new TableRow();
TableRow experienceDescriptionRow = new TableRow();
TableRow experiencePeriodFromRow = new TableRow();
TableRow experiencePeriodToRow = new TableRow();
TableCell experienceRoleTitleCell = new TableCell();
TableCell experienceRoleValueCell = new TableCell();
TableCell experienceDescriptionTitleCell = new TableCell();
TableCell experienceDescriptionValueCell = new TableCell();
TableCell experiencePeriodFromTitleCell = new TableCell();
TableCell experiencePeriodFromValueCell = new TableCell();
TableCell experiencePeriodToTitleCell = new TableCell();
TableCell experiencePeriodToValueCell = new TableCell();
experienceRoleTitleCell.Text = "Role:";
experienceRoleValueCell.Text = experience.Role;
experienceDescriptionTitleCell.Text = "Description:";
experienceDescriptionValueCell.Text = experience.CompanyDescription;
experiencePeriodFromTitleCell.Text = "Period From: ";
experiencePeriodFromValueCell.Text = experience.PeriodFrom.ToString("yy-mm-dd");
experiencePeriodToTitleCell.Text = "Period To:";
experiencePeriodToValueCell.Text = experience.PeriodTo == null
? "Present"
: experience.PeriodTo.ToString();
experienceRoleRow.Cells.Add(experienceRoleTitleCell);
experienceRoleRow.Cells.Add(experienceRoleValueCell);
experienceDescriptionRow.Cells.Add(experienceDescriptionTitleCell);
experienceDescriptionRow.Cells.Add(experienceDescriptionValueCell);
experiencePeriodFromRow.Cells.Add(experiencePeriodFromTitleCell);
experiencePeriodFromRow.Cells.Add(experiencePeriodFromValueCell);
experiencePeriodToRow.Cells.Add(experiencePeriodToTitleCell);
experiencePeriodToRow.Cells.Add(experiencePeriodToValueCell);
experienceTable.Rows.Add(experienceRoleRow);
experienceTable.Rows.Add(experienceDescriptionRow);
experienceTable.Rows.Add(experiencePeriodFromRow);
experienceTable.Rows.Add(experiencePeriodToRow);
dvUserExperience.Controls.Add(experienceTable);
String rptDuties = updatePageWithDuties(experience.Duties);
//dvUserExperience.Controls.Add(rptDuties);
}
}
private string updatePageWithDuties(List<ExperienceDuties> list)
{
Repeater rptDuties = new Repeater();
rptDuties.DataSource = list;
rptDuties.DataBind();
foreach (RepeaterItem rptItem in rptDuties.Items)
{
if (rptItem.ItemIndex == 0)
{
RepeaterItem headerTemplate = new RepeaterItem(rptItem.ItemIndex, ListItemType.Header);
HtmlGenericControl h4Tag = new HtmlGenericControl("h4");
h4Tag.InnerHtml = "Duties";
headerTemplate.Controls.Add(h4Tag);
}
RepeaterItem itemTemplate = new RepeaterItem(rptItem.ItemIndex, ListItemType.Item);
Label dutyLabel = new Label();
ExperienceDuties expDuties = ((IList<ExperienceDuties>)rptDuties.DataSource)[rptItem.ItemIndex];
dutyLabel.Text = expDuties.Description;
itemTemplate.Controls.Add(dutyLabel);
RepeaterItem seperatorItem = new RepeaterItem(rptItem.ItemIndex, ListItemType.Separator);
LiteralControl ltrHR = new LiteralControl();
ltrHR.Text = "<hr />";
seperatorItem.Controls.Add(ltrHR);
}
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
HtmlTextWriter writer = new HtmlTextWriter(sw);
rptDuties.RenderControl(writer);
return sb.ToString();
}
解决方案
You cannot render Repeater control as a string. Instead, you need to add the Repeater to dvUserExperience as a control.
private void CreateUserExperienceTable(List<UserExperience> experiences)
{
foreach (UserExperience experience in experiences)
{
...
dvUserExperience.Controls.Add(experienceTable);
// Add as a server control
Repeater rptDuties = updatePageWithDuties(experience.Duties);
dvUserExperience.Controls.Add(rptDuties);
}
}
private Repeater updatePageWithDuties(List<ExperienceDuties> list)
{
Repeater rptDuties = new Repeater();
...
return rptDuties;
}
Updated:
You need to add controls to RepeaterItem which is rptItem.
See the arrows <===== in the following code.
private Repeater updatePageWithDuties(List<ExperienceDuties> list)
{
Repeater rptDuties = new Repeater();
rptDuties.DataSource = list;
rptDuties.DataBind();
foreach (RepeaterItem rptItem in rptDuties.Items)
{
if (rptItem.ItemIndex == 0)
{
var h4Tag = new HtmlGenericControl("h4");
h4Tag.InnerHtml = "Duties";
rptItem.Controls.Add(h4Tag); <=====
}
var dutyLabel = new Label();
ExperienceDuties expDuties =
((IList<ExperienceDuties>) rptDuties.DataSource)[rptItem.ItemIndex];
dutyLabel.Text = expDuties.Description;
rptItem.Controls.Add(dutyLabel); <=====
var ltrHR = new LiteralControl();
ltrHR.Text = "<hr />";
rptItem.Controls.Add(ltrHR); <=====
}
return rptDuties;
}
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