how to to bind check box in grid view
Question
i have grid view and i binds up this check box like this :
<ItemTemplate>
<asp:CheckBox ID="chk_UserOFC1" runat="server" ToolTip="User of Easy Office" Checked='<%#Eval("UserOFC")%>'/>
</ItemTemplate>
how ever this field was nullable bit so run time error occurs :
Specified cast is not valid.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidCastException: Specified cast is not valid.
Source Error:
Line 1230: </HeaderTemplate>
Line 1231: <ItemTemplate>
Line 1232: <asp:CheckBox ID="chk_UserOFC1" runat="server" ToolTip="User of Easy Office" Checked='<%#Bind("UserOFC")%>'/>
Line 1233: </ItemTemplate>
Line 1234: <HeaderStyle CssClass="headinglist_bg" HorizontalAlign="Left" />
Source File: f:\CRM\Staff\Raise_Ticket.aspx Line: 1232
---------------------------Updated------------------------------------
public void FillGrid(string GroupByText, string ColumnName, string SearchText)
{
using (DataClassesDataContext db = new DataClassesDataContext())
{
var query = (dynamic)null;
switch (GroupByText)
{
case "Customer":
query = db.Parties.Where(p => p.type_id.Equals("1")).OrderByDescending(p => p.Register_Date).Select(p => new
{
Id = p.Id,
Name = p.Name,
type_id = p.type_id,
Ownername = p.Ownername,
Ownermob = p.Ownermob,
ContactPerson = p.ContactPerson,
ContactPersonmob = p.ContactPersonmob,
Phone = p.Phone,
Mobile = p.Mobile,
Room = p.Room,
Build = p.Build,
Road = p.Road,
Area = p.Area,
City = p.City,
country_id = p.country_id,
state_id = p.state_id,
Email = p.Email,
Remark = p.Remark,
UserOFC = p.UserOFC,
UserVAT = p.UserVAT,
UserINV = p.UserINV,
UserNone = p.UserNone,
Username = db.Users.Where(u => u.Ref_no.Equals(p.User_id)).Select(u => u.Ref_no).FirstOrDefault(),
Register_Date = p.Register_Date
}).FilterForColumn(ColumnName, SearchText).ToList();
break;
case "Enquiry":
query = db.Parties.Where(p => p.type_id.Equals("2")).OrderByDescending(p => p.Register_Date).Select(p => new
{
Id = p.Id,
Name = p.Name,
type_id = p.type_id,
Ownername = p.Ownername,
Ownermob = p.Ownermob,
ContactPerson = p.ContactPerson,
ContactPersonmob = p.ContactPersonmob,
Phone = p.Phone,
Mobile = p.Mobile,
Room = p.Room,
Build = p.Build,
Road = p.Road,
Area = p.Area,
City = p.City,
country_id = p.country_id,
state_id = p.state_id,
Email = p.Email,
Remark = p.Remark,
UserOFC = p.UserOFC,
UserVAT = p.UserVAT,
UserINV = p.UserINV,
UserNone = p.UserNone,
Username = db.Users.Where(u => u.Ref_no.Equals(p.User_id)).Select(u => u.Ref_no).FirstOrDefault(),
Register_Date = p.Register_Date
}).FilterForColumn(ColumnName, SearchText).ToList();
break;
default:
query = db.Parties.OrderByDescending(p => p.Register_Date).Select(p => new
{
Id = p.Id,
Name = p.Name,
type_id = p.type_id,
Ownername = p.Ownername,
Ownermob = p.Ownermob,
ContactPerson = p.ContactPerson,
ContactPersonmob = p.ContactPersonmob,
Phone = p.Phone,
Mobile = p.Mobile,
Room = p.Room,
Build = p.Build,
Road = p.Road,
Area = p.Area,
City = p.City,
country_id = p.country_id,
state_id = p.state_id,
Email = p.Email,
Remark = p.Remark,
UserOFC = p.UserOFC,
UserVAT = p.UserVAT,
UserINV = p.UserINV,
UserNone = p.UserNone,
Username = db.Users.Where(u => u.Ref_no.Equals(p.User_id)).Select(u => u.Ref_no).FirstOrDefault(),
Register_Date = p.Register_Date
}).FilterForColumn(ColumnName, SearchText).ToList();
break;
}
int count = 0;
DataSet myDataSet = new DataSet();
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("Id", typeof(int)));
dt.Columns.Add(new DataColumn("Name", typeof(string)));
dt.Columns.Add(new DataColumn("type_id", typeof(int)));
dt.Columns.Add(new DataColumn("Ownername", typeof(string)));
dt.Columns.Add(new DataColumn("Ownermob", typeof(string)));
dt.Columns.Add(new DataColumn("ContactPerson", typeof(string)));
dt.Columns.Add(new DataColumn("ContactPersonmob", typeof(string)));
dt.Columns.Add(new DataColumn("Phone", typeof(string)));
dt.Columns.Add(new DataColumn("Mobile", typeof(string)));
dt.Columns.Add(new DataColumn("Room", typeof(string)));
dt.Columns.Add(new DataColumn("Build", typeof(string)));
dt.Columns.Add(new DataColumn("Road", typeof(string)));
dt.Columns.Add(new DataColumn("Area", typeof(string)));
dt.Columns.Add(new DataColumn("City", typeof(string)));
dt.Columns.Add(new DataColumn("country_id", typeof(int)));
dt.Columns.Add(new DataColumn("state_id", typeof(int)));
dt.Columns.Add(new DataColumn("Email", typeof(string)));
dt.Columns.Add(new DataColumn("Remark", typeof(string)));
dt.Columns.Add(new DataColumn("UserOFC", typeof(Boolean)));
dt.Columns.Add(new DataColumn("UserVAT", typeof(Boolean)));
dt.Columns.Add(new DataColumn("UserINV", typeof(Boolean)));
dt.Columns.Add(new DataColumn("UserNone", typeof(Boolean)));
dt.Columns.Add(new DataColumn("Username", typeof(string)));
dt.Columns.Add(new DataColumn("Register_Date", typeof(DateTime)));
foreach (var item in query)
{
if (item != null)
{
count++;
DataRow dr = dt.NewRow();
dr["Id"] = int.Parse(item.Id.ToString());
dr["Name"] = item.Name.ToString();
dr["type_id"] = int.Parse(item.type_id.ToString());
if (item.Ownername != null)
{
dr["Ownername"] = item.Ownername.ToString();
}
if (item.Ownermob != null)
{
dr["Ownermob"] = item.Ownermob.ToString();
}
if (item.ContactPerson != null)
{
dr["ContactPerson"] = item.ContactPerson.ToString();
}
if (item.ContactPersonmob != null)
{
dr["ContactPersonmob"] = item.ContactPersonmob.ToString();
}
if (item.Phone != null)
{
dr["Phone"] = item.Phone.ToString();
}
if (item.Mobile != null)
{
dr["Mobile"] = item.Mobile.ToString();
}
if (item.Room != null)
{
dr["Room"] = item.Room.ToString();
}
if (item.Build != null)
{
dr["Build"] = item.Ownermob.ToString();
}
if (item.Road != null)
{
dr["Road"] = item.Road.ToString();
}
if (item.Area != null)
{
dr["Area"] = item.Area.ToString();
}
if (item.City != null)
{
dr["City"] = item.City.ToString();
}
if(item.country_id!=null)
{
dr["country_id"] = int.Parse(item.country_id.ToString());
}
if (item.state_id != null)
{
dr["state_id"] = int.Parse(item.state_id.ToString());
}
if (item.Phone != null)
{
dr["Phone"] = item.Phone.ToString();
}
if (item.Mobile != null)
{
dr["Mobile"] = item.Mobile.ToString();
}
if (item.Email != null)
{
dr["Email"] = item.Email.ToString();
}
if (item.Remark != null)
{
dr["Remark"] = item.Remark.ToString();
}
if(item.UserOFC!=null)
{
dr["UserOFC"] = bool.Parse(item.UserOFC.ToString());
}
if(item.UserVAT!=null)
{
dr["UserVAT"] = bool.Parse(item.UserVAT.ToString());
}
if(item.UserINV!=null)
{
dr["UserINV"] = bool.Parse(item.UserINV.ToString());
}
if(item.UserNone!=null)
{
dr["UserNone"] = bool.Parse(item.UserNone.ToString());
}
dr["Username"] = item.Username.ToString();
dr["Register_Date"] = Convert.ToDateTime(item.Register_Date.ToString());
dt.Rows.Add(dr);
}
}
myDataSet.Tables.Add(dt);
if (count > 0)
{
DataView myDataView = new DataView();
myDataView = myDataSet.Tables[0].DefaultView;
if (this.ViewState["SortExp"] != null)
{
myDataView.Sort = this.ViewState["SortExp"].ToString()
+ " " + this.ViewState["SortOrder"].ToString();
}
GV_ViewCustomers.DataSource = myDataView;
}
else
{
myDataSet.Tables[0].Rows.Add(myDataSet.Tables[0].NewRow());
GV_ViewCustomers.DataSource = myDataSet;
GV_ViewCustomers.DataBind();
int columncount = GV_ViewCustomers.Rows[0].Cells.Count;
GV_ViewCustomers.Rows[0].Cells.Clear();
GV_ViewCustomers.Rows[0].Cells.Add(new TableCell());
GV_ViewCustomers.Rows[0].Cells[0].ColumnSpan = columncount;
GV_ViewCustomers.Rows[0].Cells[0].Text = "No Records Found";
}
GV_ViewCustomers.DataBind();
if (GV_ViewCustomers.Rows.Count != 0)
{
SetPageNumbers();
}
}
}
this is my grid view bind code.
2 answers
solution1
3 ACCPTED 2014-04-29 12:43:59
If UserOFC always contains either True or False then you can use the following approaach,
Checked='<%# Convert.ToBolean(Eval("UserOFC").ToString()) %>'
OR
If UserOFC may contain other that True or False (a null value) then you can use the following approach,
On RowDataBound even of the GridView use
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRowView rowView = (DataRowView)e.Row.DataItem;
if(rowView["UserOFC"] != null)
{
try
{
(e.Row.FindControl("chk_UserOFC1") as CheckBox).Checked = Convert.ToBolean(rowView["UserOFC"].ToString());
}
catch
{
}
}
}
solution2
2 2014-04-29 12:55:17
尝试将复选框的选中属性设置为
Checked='<%# Convert.ToBoolean(Eval("UserOFC").ToString()) %>'
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