我的asp.net页面包含gridview，如下所示
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
OnPageIndexChanging="gridView_PageIndexChanging"
OnSorting="TaskGridView_Sorting"
AllowSorting="True" AutoGenerateColumns="False"
onselectedindexchanged="GridView1_SelectedIndexChanged"
BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"
CellPadding="3" CellSpacing="2">
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<Columns>
<asp:boundfield datafield="name_english" convertemptystringtonull="true" headertext="Name"/>
<asp:BoundField DataField="Inc_ID" convertemptystringtonull="true" HeaderText="Inc_ID" SortExpression="Inc_ID"/>
<asp:BoundField DataField="UID" HeaderText="Study_UID" SortExpression= "UID"/>
</Columns>
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
</asp:GridView>
我使用以下代码填写并对其进行排序
protected void Button1_Click(object sender, EventArgs e)
{
//connection to database
string connection = System.Configuration.ConfigurationManager.ConnectionStrings["NorthindConnectionString"].ConnectionString;
SqlConnection myConn = new SqlConnection(connection);
myConn.Open();
SqlCommand cmd = new SqlCommand(" WorkList", myConn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@Name", TextBox1.Text));
cmd.Parameters.Add(new SqlParameter("@ID", TextBox2.Text));
cmd.Parameters.Add(new SqlParameter("@AccNo", TextBox4.Text));
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
Session["TaskTable"] = ds.Tables[0];
ds.Dispose();
da.Dispose();
GridView1.Visible = true;
myConn.Close();
}
protected void TaskGridView_Sorting(object sender, GridViewSortEventArgs e)
{
//Retrieve the table from the session object.
DataTable dt = Session["TaskTable"] as DataTable;
if (dt != null)
{
//Sort the data.
dt.DefaultView.Sort = e.SortExpression + " " + GetSortDirection(e.SortExpression);
GridView1.DataSource = Session["TaskTable"];
GridView1.DataBind();
}
}
private string GetSortDirection(string column)
{
// By default, set the sort direction to ascending.
string sortDirection = "ASC";
// Retrieve the last column that was sorted.
string sortExpression = ViewState["SortExpression"] as string;
if (sortExpression != null)
{
// Check if the same column is being sorted.
// Otherwise, the default value can be returned.
if (sortExpression == column)
{
string lastDirection = ViewState["SortDirection"] as string;
if ((lastDirection != null) && (lastDirection == "ASC"))
{
sortDirection = "DESC";
}
}
}
// Save new values in ViewState.
ViewState["SortDirection"] = sortDirection;
ViewState["SortExpression"] = column;
return sortDirection;
}
}
单击任何标题进行排序时出现问题引发错误System.IndexOutOfRangeException：找不到列名..，任何想法解决这个问题，我肯定从数据库中的列名，
答案 0 :(得分：4)
private string ConvertSortDirectionToSql(SortDirection sortDirection)
{
string newSortDirection = String.Empty;
switch (sortDirection)
{
case SortDirection.Ascending:
newSortDirection = "ASC";
break;
case SortDirection.Descending:
newSortDirection = "DESC";
break;
}
return newSortDirection;
}
protected void gridView_Sorting(object sender, GridViewSortEventArgs e)
{
DataTable dataTable = gridView.DataSource as DataTable;
if (dataTable != null)
{
DataView dataView = new DataView(dataTable);
dataView.Sort = e.SortExpression + " " + ConvertSortDirectionToSql(e.SortDirection);
gridView.DataSource = dataView;
gridView.DataBind();
}
}
试试这段代码..
答案 1 :(得分：2)
您需要将网格绑定到已排序的视图（而不是原始表），以便进行排序。
protected void TaskGridView_Sorting(object sender, GridViewSortEventArgs e)
{
//Retrieve the table from the session object.
DataTable dt = Session["TaskTable"] as DataTable;
if (dt != null)
{
//Sort the data.
dt.DefaultView.Sort = e.SortExpression;
GridView1.DataSource = dt.DefaultView;
GridView1.DataBind();
}
}
我不确定您是否需要GetSortDirection方法。
另请注意，SortExpression属性包含排序方向（例如“UID DESC”），因此将逻辑基于此。您的代码可以设置排序表达式，例如“UID DESC ASC”，这显然是一个错误的表达。
答案 2 :(得分：1)
为了使代码在asp.net或Web环境中工作，您需要将您的gridview在Session中放入会话对象，并将您的排序放在视图状态中。为了使分页与分页一起使用，请执行以下操作。
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session["SearchTable"] = gv_GridView.DataSource;
LoadSearchGrid("Select * from WF_Search);
}
private void LoadSearchGrid(string query)
{
DataTable dsp = new DataTable();
conn = new SqlConnection(ConnectionString);
SqlDataAdapter sda = new SqlDataAdapter(query, conn);
conn.Open();
sda.Fill(dsp);
Session["SearchTable"] = dsp;
gv_GridView.DataSource = Session["SearchTable"];
gv_GridView.DataBind();
conn.Close();
sda.Dispose();
}
protected void gv_GridView_Sorting(object sender, GridViewSortEventArgs e)
{
ViewState["SortDirection"] = e.SortDirection;
DataTable dtr = Session["SearchTable"] as DataTable;
if (dtr != null)
{
dtr.DefaultView.Sort = e.SortExpression + " " + getSortDirection(e.SortExpression);
gv_GridView.DataSource = Session["SearchTable"];
gv_GridView.DataBind();
Session["SearchTable"] = gv_GridView.DataSource;
}
}
private string getSortDirection(string column)
{
string sortDirection = "ASC";
string sortExpression = ViewState["SortDirection"] as string;
if (sortExpression != null)
{
if (sortExpression == column)
{
string lastDirection = ViewState["SortDirection"] as string;
if (lastDirection != null && lastDirection == "ASC")
{
sortDirection = "DESC";
}
}
}
ViewState["SortDirection"] = sortDirection;
ViewState["SortExpression"] = column;
return sortDirection;
}
protected void gv_GridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gv_GridView.DataSource = Session["SearchTable"];
gv_GridView.DataBind();
gv_GridView.PageIndex = e.NewPageIndex;
}