[英]Input string was not in a correct format asp.net c#
我有一个网格,它正在显示这是有用的用户。 您可以单击编辑(图像按钮)或删除(图像按钮)来执行操作。 但是,如果我点击这些,我会得到一个
输入字符串的格式不正确
这不应该发生 - 我没有看到我的错误。 问题是什么?
这是我的网格:
<asp:EntityDataSource ID="EntityDataSource1" runat="server"
ConnectionString="name=HolidayTrackerEntities"
DefaultContainerName="HolidayTrackerEntities" EnableFlattening="False"
EntitySetName="HtUsers">
</asp:EntityDataSource>
<telerik:RadGrid ID="rgGrid" runat="server" DataSourceID="EntityDataSource1"
AllowSorting="True" AllowPaging="True" PageSize="20"
AllowFilteringByColumn="True" ShowStatusBar="True" Width="100%"
CellSpacing="0" GridLines="None" OnItemCommand="rgGrid_ItemCommand">
<MasterTableView AutoGenerateColumns="False" DataKeyNames="UserId">
<NoRecordsTemplate>
Can't find Users to display
</NoRecordsTemplate>
<Columns>
<telerik:GridBoundColumn DataField="UserId" DataType="System.Int32"
FilterControlAltText="Filter UserId column" HeaderText="UserId"
ReadOnly="True" SortExpression="UserId" UniqueName="UserId"
Visible="false">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="FirstName"
FilterControlAltText="Filter FirstName column"
HeaderText="FirstName" ItemStyle-Width="60px"
SortExpression="FirstName" UniqueName="FirstName">
<ItemStyle Width="60px" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="LastName"
FilterControlAltText="Filter LastName column"
HeaderText="LastName" ItemStyle-Width="60px"
SortExpression="LastName" UniqueName="LastName">
<ItemStyle Width="60px" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="UserName"
FilterControlAltText="Filter UserName column"
HeaderText="UserName" ItemStyle-Width="60px"
SortExpression="UserName" UniqueName="UserName">
<ItemStyle Width="60px" />
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="Email"
FilterControlAltText="Filter Email column"
HeaderText="Email" SortExpression="Email" UniqueName="Email"
Visible="False">
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn UniqueName="DeleteColumn"
ItemStyle-HorizontalAlign="Right" ItemStyle-Width="20px"
AllowFiltering="false">
<ItemTemplate>
<telerik:RadButton ID="btnEdit" CommandName="Edit" runat="server" Width="20px" ToolTip="View Details" Height="20px">
<Image ImageUrl="~/Resources/Images/Grid/edit-app.png" IsBackgroundImage="true" />
</telerik:RadButton>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn UniqueName="Delete"
ItemStyle-HorizontalAlign="Right" ItemStyle-Width="20px"
AllowFiltering="false" FilterImageUrl="../Image/Filter.gif">
<ItemTemplate>
<telerik:RadButton ID="btnDelete" CommandName="Delete" runat="server" Width="20px" ToolTip="Delte User" Height="20px">
<Image ImageUrl="~/Resources/Images/Grid/delete-app.png" IsBackgroundImage="true" />
</telerik:RadButton>
</ItemTemplate>
</telerik:GridTemplateColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>
正如我说的没什么特别的。 以下是代码背后的按钮:
protected void rgGrid_ItemCommand(object sender, GridCommandEventArgs e)
{
if (e.CommandName.Equals("Edit"))
{
int id = int.Parse(e.Item.Cells[2].Text);
Response.Redirect("~/Administrator/UserEditPanel.aspx?userId=" + id);
}
else if (e.CommandName.Equals("Delete"))
{
int id = int.Parse(e.Item.Cells[2].Text);
HtUser.DeleteUserById(id);
}
}
我在User类中的删除功能
public static void DeleteUserById(int id)
{
HolidayTrackerEntities ctx = HtEntityFactory.Context;
HtUser userToDelete = ctx.HtUsers.Where(user => user.UserId == id).FirstOrDefault();
//Get all the userroles where user is containing
IEnumerable<HtUserRole> roles = ctx.HtUserRoles.Where(ur => ur.HtUsers.Where(x => x.UserId == id).Any());
foreach (HtUserRole role in roles)
{
//Remove reference from htuserroles table
role.HtUsers.Remove(userToDelete);
}
ctx.HtUsers.DeleteObject(userToDelete);
ctx.SaveChanges();
}
e.Item.Cells[2]
是DataField="LastName"
的单元格。 所以我假设这不是一个有效的整数。 您将id存储在第一列中,因此您需要:
protected void rgGrid_ItemCommand(object sender, GridCommandEventArgs e)
{
if (e.CommandName.Equals("Edit"))
{
int id = int.Parse(e.Item.Cells[0].Text);
Response.Redirect("~/Administrator/UserEditPanel.aspx?userId=" + id);
}
else if (e.CommandName.Equals("Delete"))
{
int id = int.Parse(e.Item.Cells[0].Text);
HtUser.DeleteUserById(id);
}
}
更好的方法是将UserId
分配给Edit和Delete按钮的CommandArgument
属性,然后在rgGrid_ItemCommand
解析它,而不是解析列文本。 要将UserId
分配给按钮:
<telerik:GridTemplateColumn UniqueName="DeleteColumn" ItemStyle-HorizontalAlign="Right" ItemStyle-Width="20px" AllowFiltering="false">
<ItemTemplate>
<telerik:RadButton ID="btnEdit" CommandName="Edit" runat="server" Width="20px" ToolTip="View Details"
Height="20px" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "UserId")%>'>
<Image ImageUrl="~/Resources/Images/Grid/edit-app.png" IsBackgroundImage="true" />
</telerik:RadButton>
</ItemTemplate>
</telerik:GridTemplateColumn>
然后在你的代码隐藏中:
protected void rgGrid_ItemCommand(object sender, GridCommandEventArgs e)
{
var userId = int.Parse(e.CommandArgument.ToString());
if (e.CommandName.Equals("Edit"))
{
Response.Redirect("~/Administrator/UserEditPanel.aspx?userId=" + userId);
}
else if (e.CommandName.Equals("Delete"))
{
HtUser.DeleteUserById(userId);
}
}
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