如何在网格视图中绑定复选框
[英]how to to bind check box in grid view
问题描述
我有网格视图，我将这个复选框像这样绑定起来：
<ItemTemplate>
<asp:CheckBox ID="chk_UserOFC1" runat="server" ToolTip="User of Easy Office" Checked='<%#Eval("UserOFC")%>'/>
</ItemTemplate>
此字段是如何为空的位，因此发生运行时错误：
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();
}
}
}
这是我的网格视图绑定代码。
2 个解决方案
解决方案1
3 已采纳 2014-04-29 12:43:59
如果UserOFC始终包含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）以外的其他内容，则可以使用以下方法，
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
{
}
}
}
解决方案2
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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