從ASP GridView和數據表中刪除行

Question

我有與數據表綁定的asp gridview。 僅一個復選框復選框模板與源數據表列（ sel ）綁定。

這是標記示例：

<asp:GridView  ID="testGrid"  
                CssClass="ObjSelection" 
                AutoGenerateColumns="false" 
                OnRowDataBound="testGrid_RowDataBound"
                runat="server">
 <Columns>
     <asp:TemplateField HeaderText="&nbsp">
        <HeaderTemplate>
           <asp:CheckBox ID="chkAll" runat="server" Enabled="true" AutoPostBack="true" />
        </HeaderTemplate>
        <ItemTemplate>
            <asp:CheckBox AutoPostBack="true" ID="chkRow" runat="server" Checked='<%# DataBinder.Eval(Container.DataItem, "sel")%>' OnCheckedChanged="ChkRow_OnCheckChange" />
        </ItemTemplate>
     </asp:TemplateField>                                   

 </Columns>
</asp:GridView>

如您所見，我沒有使用RowCommand刪除行。 我在單獨的div有一個工具欄，其中顯示刪除按鈕。

您能指導我如何在另一個div中存在的單擊按鈕時both from DataSource and GridView刪除一行嗎？

Answer 1

使用以下代碼從ViewState或Session中的數據表中刪除所選行，並分配數據源

Aslo將數據鍵分配給GridView

<asp:GridView  ID="testGrid"    DataKeyNames="PrimaryKey" 
                CssClass="ObjSelection" 
                AutoGenerateColumns="false" 
                OnRowDataBound="testGrid_RowDataBound"
                runat="server">

背后的代碼：

protected void btnRemove(object sender, EventArgs e)
    {
        // Check session exists 
        if (Session["Key"] != null)
        {
            // Opening / Retreiving DataTable.
            DataTable dt = (DataTable)Session["Key"];

            foreach (GridViewRow row in testGrid.Rows)
            {
                CheckBox chkRow= row.Cells[0].FindControl("chkRow") as CheckBox;

                if (chkRow!= null && chkRow.Checked)
                {                    
                    int Id = Convert.ToInt32(testGrid.DataKeys[row.RowIndex].Value); 

                    DataRow[] drs = dt.Select("PrimaryKey = '" + Id + "'"); // replace with your criteria as appropriate

                    if (drs.Length > 0)
                    {
                        dt .Rows.Remove(drs[0]);
                    }
                }
            }

            Session["Key"] = dt ;
            testGrid.DataSource = dt ;
            testGrid.DataBind();
        }
    }

Answer 2

您可以使用隱藏字段通過javascript和jQuery放置行ID

<asp:HiddenField runat="server" ID="IDField"/>

jQuery的

<script>
    $(document).ready(function(){
              $("#testGrid tr").click(function(){
              $("#IDField").val($(this).children("td.IDColumn").text());
              $(this).Index(); // will give you row index
              });
});
</script>

點擊刪除按鈕

protected void delete_Click(object sender,EventArg e)
{
 //delete from datasource use this.IDField.Value   

//to refresh data in grid 
this.testGrid.DataSource = dataTable;
this.testGrid.DataBind();

}

Answer 3

gridview_RowDataBound(Sender sender,eventArgs e)
{
CheckBox lblChkRow = (CheckBox)e.Row.FindControl("IDField");
if(lblChkRow.Checked)
{
// Delete Value here and bind with datasource

}