我正在为我的学校的内部目录服务工作,并且在代码隐藏中在动态生成的gridview上创建“mailto:”链接时出现问题。在代码隐藏中创建一个动态生成的gridview的mailto链接
经过一段时间的修补之后,我发现Hyperlinkfields不支持“:”字符 - 使得“mailto:”链接不可能。
因为我动态生成Gridviews以允许按标题分组,所以我在代码隐藏中完成了所有工作。 Gridviews是从数据源读取创建的,并添加到aspx页面上的占位符标记以及定义该组的相应标签。
public void GenerateDynamicGVs()
{
//...
DataTable dt = new DataTable();
//...
using (SqlDataReader dr = DBUtility.ExecuteReader(cmd, "www_ConMasterDBString"))
{
dt.Load(dr);
var query = dt.AsEnumerable()
.GroupBy(r => r.Field<string>("GroupName"))
.Select(grp => new
{
GroupName = grp.Key,
})
.OrderBy(o => o.GroupName)
.ToList();
foreach (var item in query)
{
Label NewLabel = new Label();
NewLabel.Text = item.GroupName;
NewLabel.CssClass = "DirectoryHeaders";
GridView newGV = new GridView();
newGV.CssClass = "CONServices";
newGV.ShowHeader = false;
newGV.AutoGenerateColumns = false;
newGV.DataSource = dt.AsEnumerable().Where(p => p.Field<string>("GroupName") == item.GroupName)
.Select(p => new
{
id = p["id"].ToString(),
EntryName = p["EntryName"].ToString(),
EntryNumber = p["EntryNumber"].ToString(),
EntryContact = p["EntryContact"].ToString(),
Email = p["Email"].ToString(),
GroupName = p["GroupName"].ToString()
});
HyperLinkField hlName = new HyperLinkField();
BoundField bfNumber = new BoundField();
BoundField bfContact = new BoundField();
hlName.DataNavigateUrlFields = new string[] { dt.Columns[4].ToString() };
hlName.DataTextField = dt.Columns[1].ToString();
hlName.DataNavigateUrlFormatString = "mailto:{0}"; //This line executes, but is not a clickable link because of the colon.
bfNumber.DataField = dt.Columns[2].ToString();
bfContact.DataField = dt.Columns[3].ToString();
newGV.Columns.Add(hlName);
newGV.Columns.Add(bfNumber);
newGV.Columns.Add(bfContact);
divPlaceHolder.Controls.Add(NewLabel);
divPlaceHolder.Controls.Add(newGV);
newGV.DataBind();
}
dr.Close();
}
}
有没有一种很好的方法来在代码隐藏中创建一个mailto链接?由于需要动态创建,我无法将其转换为aspx文件。我在这里错过了什么吗?任何帮助或建议,不胜感激。谢谢。
编辑:链接需要显示名称而不是电子邮件地址,需要调用数据表中的两列:[1]和[4]。
明白了,代码全部在下面。
凡我gridview的东西是:
tfName.ItemTemplate = new NameColumn();
这是所需的TemplateField类。这是一个有点乱用文字标签,但我对于工作的解决方案只是很高兴:
class NameColumn : ITemplate
{
public void InstantiateIn(System.Web.UI.Control container)
{
Literal lit1 = new Literal();
Literal litName = new Literal();
Literal lit3 = new Literal();
Literal litEmail = new Literal();
Literal lit5 = new Literal();
lit1.Text = "<a href=\"mailto:";
lit3.Text = "\">";
lit5.Text = "</a>";
litEmail.DataBinding += new EventHandler(LabelEmailDatabinding);
litName.DataBinding += new EventHandler(LabelNameDatabinding);
container.Controls.Add(lit1);
container.Controls.Add(litEmail);
container.Controls.Add(lit3);
container.Controls.Add(litName);
container.Controls.Add(lit5);
}
private void LabelNameDatabinding(object sender, EventArgs e)
{
Literal lit = (Literal)sender;
GridViewRow row = (GridViewRow)lit.NamingContainer;
lit.Text = DataBinder.Eval(row.DataItem, "EntryName").ToString();
}
private void LabelEmailDatabinding(object sender, EventArgs e)
{
Literal lit = (Literal)sender;
GridViewRow row = (GridViewRow)lit.NamingContainer;
lit.Text = DataBinder.Eval(row.DataItem, "Email").ToString();
if (lit.Text == null)
{
lit.Text = "test";
}
}
}
感谢您的建议,只是试了一下。没有工作:/ –