asp.net: Getting the Click event of an TemplateField -- asp.net

RE: Getting the Click event of an TemplateField

Milosz Skalecki [MCAD]
2/23/2007 4:41:05 PM

asp.net:

Please find fixed code below. Two things, 1. you have to create grid on init
event handler, 2. bind data only once (IsPostBack == false)

protected void Page_Init(object sender, EventArgs e)
{
CreateGrid();
}

public DataTable GetData()
{
DataTable t = new DataTable();

t.Columns.Add("Id", typeof(int));
t.Columns.Add("Name", typeof(string));
t.Columns.Add("Invoice", typeof(string));
t.Columns.Add("MarkID", typeof(int));

for (int i = 0; i < 10; i++)
{
string str = i.ToString();
DataRow r = t.NewRow();
r[0] = i;
r[1] = "name" + str;
r[2] = "inv" + str;
r[3] = i;
t.Rows.Add(r);
}

return t;
}

private void CreateGrid()
{
DataTable dtt = GetData();

foreach (DataColumn col in dtt.Columns)
{

if (col.ColumnName.Equals("FakAID") || col.ColumnName.Equals("markID") ||
col.ColumnName.Equals("FilID"))

continue;

if (col.ColumnName.Equals("Invoice"))
{

TemplateField tempColumn = new TemplateField();

tempColumn.HeaderText = col.ColumnName;

tempColumn.ItemTemplate = new LinkButtonTemplate(col.ColumnName,
"~/screen.aspx?nav=1&tab=I&cid=", "markID");

grvSearchResult.Columns.Add(tempColumn);

}

else if (col.ColumnName.Equals("File"))
{

TemplateField tempColumn = new TemplateField();

tempColumn.HeaderText = col.ColumnName;

tempColumn.ItemTemplate = new LinkButtonTemplate(col.ColumnName,
"~/screen.aspx?nav=1&fid=", "FilID");

grvSearchResult.Columns.Add(tempColumn);

}

else if (col.ColumnName.Equals("Customer"))
{

TemplateField tempColumn = new TemplateField();

tempColumn.HeaderText = col.ColumnName;

tempColumn.ItemTemplate = new LinkButtonTemplate(col.ColumnName,
"~/screent.aspx?nav=1&cid=", "FakID");

grvSearchResult.Columns.Add(tempColumn);

}

else
{

BoundField boundColumn = new BoundField();

boundColumn.DataField = col.ColumnName;

boundColumn.HeaderText = col.ColumnName;

grvSearchResult.Columns.Add(boundColumn);

}

}

if (!IsPostBack)
{
grvSearchResult.DataSource = dtt;
grvSearchResult.DataBind();
}
}

#region LinkButtonTemplate

public class LinkButtonTemplate : ITemplate, INamingContainer
{

string theColumnName = "", thePostBackUrl = "", theColumnCommandArg = "";

public LinkButtonTemplate(string ColumnName, string PostBackUrl, string
ColumnCommandArg)
{

theColumnName = ColumnName;

thePostBackUrl = PostBackUrl;

theColumnCommandArg = ColumnCommandArg;

}

public void InstantiateIn(Control container)
{

LinkButton lnk = new LinkButton();

container.Controls.Add(lnk);

lnk.DataBinding += new EventHandler(lnk_DataBinding);
lnk.ID = "idx";
lnk.Click += new EventHandler(lnk_Click);

}

void lnk_Click(object sender, EventArgs e)
{
// event handler will execute now
}

void lnk_DataBinding(object sender, EventArgs e)
{

LinkButton lnk = (LinkButton)sender;
DataRowView drv = (DataRowView)((GridViewRow)lnk.NamingContainer).DataItem;
lnk.Text = drv[theColumnName].ToString();
//lnk.PostBackUrl = thePostBackUrl + drv[theColumnCommandArg].ToString();

}

}

#endregion

--
Milosz

[quoted text, click to view]

Getting the Click event of an TemplateField

Class
2/23/2007 10:22:19 PM

Hi all,

I create a gridview dynamicly because I don't know the columns in advance.
I use the Templatefield to create a linkbutton.
Everything fine..I have the postbackurl and it works.
But now I need to do some extra stuff in the click event of the created
linkbutton.
I tried to assign a delegate to the linkbutton's click event but I never
gets in the procedure I assign.
How can I trap the click event?

Thank you.

Here is the code:

private void CreateGrid()
{
//Create the grid:

foreach (DataColumn col in dtt.Columns)

{

if (col.ColumnName.Equals("FakAID") || col.ColumnName.Equals("markID") ||
col.ColumnName.Equals("FilID"))

continue;

if (col.ColumnName.Equals("Invoice"))

{

TemplateField tempColumn = new TemplateField();

tempColumn.HeaderText = col.ColumnName;

tempColumn.ItemTemplate = new LinkButtonTemplate(col.ColumnName,
"~/screen.aspx?nav=1&tab=I&cid=", "markID");

grvSearchResult.Columns.Add(tempColumn);

}

else if (col.ColumnName.Equals("File"))

{

TemplateField tempColumn = new TemplateField();

tempColumn.HeaderText = col.ColumnName;

tempColumn.ItemTemplate = new LinkButtonTemplate(col.ColumnName,
"~/screen.aspx?nav=1&fid=", "FilID");

grvSearchResult.Columns.Add(tempColumn);

}

else if (col.ColumnName.Equals("Customer"))

{

TemplateField tempColumn = new TemplateField();

tempColumn.HeaderText = col.ColumnName;

tempColumn.ItemTemplate = new LinkButtonTemplate(col.ColumnName,
"~/screent.aspx?nav=1&cid=", "FakID");

grvSearchResult.Columns.Add(tempColumn);

}

else

{

BoundField boundColumn = new BoundField();

boundColumn.DataField = col.ColumnName;

boundColumn.HeaderText = col.ColumnName;

grvSearchResult.Columns.Add(boundColumn);

}

}

grvSearchResult.DataSource = dtt;

grvSearchResult.DataBind();
}

#region LinkButtonTemplate

public class LinkButtonTemplate : ITemplate, INamingContainer

{

string theColumnName = "", thePostBackUrl = "", theColumnCommandArg = "";

public LinkButtonTemplate(string ColumnName, string PostBackUrl, string
ColumnCommandArg)

{

theColumnName = ColumnName;

thePostBackUrl = PostBackUrl;

theColumnCommandArg = ColumnCommandArg;

}

public void InstantiateIn(Control container)

{

LinkButton lnk = new LinkButton();

container.Controls.Add(lnk);

lnk.DataBinding += new EventHandler(lnk_DataBinding);

}

void lnk_DataBinding(object sender, EventArgs e)

{

LinkButton lnk = (LinkButton)sender;

DataRowView drv = (DataRowView)((GridViewRow)lnk.NamingContainer).DataItem;

lnk.Text = drv[theColumnName].ToString();

lnk.PostBackUrl = thePostBackUrl + drv[theColumnCommandArg].ToString();

}

}

#endregion