如何在網格視圖中綁定復選框
[英]how to to bind check box in grid view
問題描述
我有網格視圖，我將這個復選框像這樣綁定起來：
<ItemTemplate>
<asp:CheckBox ID="chk_UserOFC1" runat="server" ToolTip="User of Easy Office" Checked='<%#Eval("UserOFC")%>'/>
</ItemTemplate>
此字段是如何為空的位，因此發生運行時錯誤：
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
- - - - - - - - - - - - - -更新 - - - - - - - - - - - --------------
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();
}
}
}
這是我的網格視圖綁定代碼。
2 個解決方案
解決方案1
3 已采納 2014-04-29 12:43:59
如果UserOFC始終包含True或False那么您可以使用以下方法，
Checked='<%# Convert.ToBolean(Eval("UserOFC").ToString()) %>'
要么
如果UserOFC可能包含True或False （ null值）以外的其他內容，則可以使用以下方法，
在RowDataBound甚至是GridView使用
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
{
}
}
}
解決方案2
2 2014-04-29 12:55:17
嘗試將復選框的選中屬性設置為
Checked='<%# Convert.ToBoolean(Eval("UserOFC").ToString()) %>'
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