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[英]'System.IndexOutOfRangeException' Cannot find column 12
[英]System.IndexOutOfRangeException: Cannot find column 3. with dynamic Datatable Column Creation in ASP.net
我有一項工作需要在同一數據表中顯示靜態和動態列..以下是Gridview中的數據表列的說明...
第一列應該是復選框列,它是靜態的。第二列是用戶名列,它也是靜態的。
該列的其余部分需要從代碼中動態合並。
這是.aspx中的gridview的代碼。
<asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView1_RowDataBound"
AutoGenerateColumns="False" BackColor="LightGoldenrodYellow" BorderColor="Tan"
BorderWidth="1px" CellPadding="2" ForeColor="Black" GridLines="None"
Width="477px">
<AlternatingRowStyle BackColor="PaleGoldenrod" />
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="chkhdr" runat="server" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkChild" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Username">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("col0") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Role(Admin)">
<ItemTemplate>
<asp:CheckBox ID="chkAdmin" runat="server" Checked='<%# Eval("col1") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Role(DPAO User )">
<ItemTemplate>
<asp:CheckBox ID="chkUser" runat="server" Checked='<%# Eval("col2") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Role(GeneralUser)">
<ItemTemplate>
<asp:CheckBox ID="chkgen" runat="server" Checked='<%# Eval("col3") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
這是我在文件后面的代碼,該文件使用mssql的Membership數據表在gridview的行中以選中或未選中模式顯示記錄
protected void BindGridviewData()
{
var role = from MembershipUser u in Membership.GetAllUsers()
select new
{
User = u.UserName,
Role = string.Join(",", Roles.GetRolesForUser(u.UserName))
};
DataTable dTable = new DataTable();
string[] rolesarr = Roles.GetAllRoles();
//int length = rolesarr.Count();
for (int i = 0; i < rolesarr.Length; i++)
{
string colname = rolesarr[i];
if (i == 0)
{
dTable.Columns.Add(colname, typeof(string));
}
else
{
dTable.Columns.Add(colname, typeof(bool));
}
}
foreach (MembershipUser u in Membership.GetAllUsers())
{
DataRow dRow = dTable.NewRow();
dRow[0] = u.UserName;
string[] roles = Roles.GetRolesForUser(u.UserName);
dRow[1] = roles.Contains("Admin") ? true : false;
dRow[2] = roles.Contains("DPAO User") ? true : false;
dRow[3] = roles.Contains("GeneralUser") ? true : false;
dTable.Rows.Add(dRow);
}
GridView1.DataSource = dTable;
GridView1.DataBind();
}
但是它在問題的標題中給出了上述錯誤
DataTable dTable = new DataTable();
string[] rolesarr = Roles.GetAllRoles();
// add column for user name
dTable.Columns.Add("User Name", typeof(string));
// then add all the roles as columns
Array.ForEach(rolesarr, r => dTable.Columns.Add(r));
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