public void BindGrid(int rowcount)
{
btnsubmit.Visible = true;
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new System.Data.DataColumn("Employee ID", typeof(String)));
dt.Columns.Add(new System.Data.DataColumn("Leave Type", typeof(String)));
dt.Columns.Add(new System.Data.DataColumn("From", typeof(String)));
dt.Columns.Add(new System.Data.DataColumn("To", typeof(String)));
dt.Columns.Add(new System.Data.DataColumn("No:of Days", typeof(String)));
if (ViewState["CurrentData"] != null)
{
for (int i = 0; i < rowcount + 1; i++)
{
dt = (DataTable)ViewState["CurrentData"];
if (dt.Rows.Count > 0)
{
dr = dt.NewRow();
dr[0] = dt.Rows[0][0].ToString();
}
}
dr = dt.NewRow();
dr[0] = lblempID.Text;
dr[1] = ddlleavetype.SelectedItem.Text.ToString();
dr[2] = txtfrom.Text.ToString();
dr[3] = txtto.Text.ToString();
dt.Rows.Add(dr);
}
else
{
dr = dt.NewRow();
dr[0] = lblempID.Text;
dr[1] = ddlleavetype.SelectedItem.Text.ToString();
dr[2] = txtfrom.Text.ToString();
dr[3] = txtto.Text.ToString();
dt.Rows.Add(dr);
}
// If ViewState has a data then use the value as the DataSource
if (ViewState["CurrentData"] != null)
{
gvLeave.DataSource = (DataTable)ViewState["CurrentData"];
gvLeave.DataBind();
}
else
{
// Bind GridView with the initial data assocaited in the DataTable
gvLeave.DataSource = dt;
gvLeave.DataBind();
}
// Store the DataTable in ViewState to retain the values
ViewState["CurrentData"] = dt;
}
In my page having from date textbox and todate textbox..i want to calculate the between two dates ,please help me
If they are in a textbox you will need to parse them first using DateTime.Parse
. This is under the assumption that the strings are in the correct format
DateTime myDate = DateTime.Parse(myDateString);
To calculate the days between two dates you can try this
TimeSpan span =date1-date2;
var days = span.TotalDays;
I'm not very familiar with the DataTable object, so take this answer as an idea. :-)
Why don't you specify the Rows with the actual type?
dt.Columns.Add(new System.Data.DataColumn("From", typeof(DateTime)));
dt.Columns.Add(new System.Data.DataColumn("To", typeof(DateTime)));
dt.Columns.Add(new System.Data.DataColumn("No:of Days", typeof(int)));
And after this you can Parse the data of txtfrom
like dr[2] = DateTime.Parse(txtfrom.Text.ToString())
and assign it to your DataRow. Same goes for txtto.
After this, you are able to calculate the days between by using:
dr[4] = (int)((dr[2] -dr[3]).TotalDays);
If this doesn't work, try to save the parsed Dates in objects like so:
DateTime from = DateTime.Parse(txtfrom.Text.ToString());
DateTime to = ...;
TimeSpan t1 = to - from;
dt[4] = (int)(t1.TotalDays);
试试这个代码:
Var Day= DateTime.Parse(todate.Text).Subtract(DateTime.Parse(fromdate.Text)).Days;
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