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Asp.net HTML:asp.net的GridView設置爲null,數據源
<asp:GridView ID="GrdDynamic" runat="server"
AllowPaging="true"
GridLines="None"
PageSize="20"
CellSpacing="0"
AlternatingItemStyle-CssClass="rowb renkliSatir"
CssClass="tumislerimtable"
AllowSorting="true"
AutoGenerateColumns="false">
<HeaderStyle CssClass="rowa" />
</asp:GridView>
<asp:ImageButton ID="search" runat="server"
AlternateText="Search"
ImageUrl="../images/search.gif"
OnClick="search_Click">
</asp:ImageButton>
如果我點擊搜索按鈕下面方法適用
search_Click方法
protected void search_Click(object sender, ImageClickEventArgs e)
{
DataTable NullDataTable = new DataTable();
NullDataTable = null;
GrdDynamic.DataSource = NullDataTable; // I'm trying to clear gridview datasource however this is not working for me
GrdDynamic.DataBind();
//After that i bind datasource as below programatically
DataTable dt = new DataTable();
DataRow drow = dt.NewRow();
foreach (var project in MultiComboBox.CheckedItems.ToList())
{
DataSet ds = procedure.getProjectByID(type.SelectedValue, startDate, endDate);
if (ds.Tables[0].Rows.Count > 0)
{
DataColumn dcol = new DataColumn(ds.Tables[0].Rows[0 ["flow_name"].ToString(), typeof(System.Int32));
dt.Columns.Add(dcol);
drow[ds.Tables[0].Rows[0]["flow_name"].ToString()] = ds.Tables[0].Rows[0]["Sayi"].ToString();
}
}
dt.Rows.Add(drow);
foreach (DataColumn col in dt.Columns)
{
BoundField bfield = new BoundField();
bfield.DataField = col.ColumnName;
bfield.HeaderText = col.ColumnName;
GrdDynamic.Columns.Add(bfield);
}
GrdDynamic.DataSource = dt;
GrdDynamic.DataBind();
}
如果我第一次點擊搜索按鈕結果如下
flow_name
1
如果我點擊搜索按鈕,第二次結果如下
flow name flow_name
1 1
如果我點擊搜索按鈕,第三次結果如下
flow name flow_name flow_name
1 1 1
問:
當我點擊按鈕列和行復制一個ho wever我設置datasource null onclick搜索按鈕,但這是行不通的。我可以如何解決這個問題,我該如何防止複製相同的列和行值?