如何在GridView側面的按鈕單擊事件中隱藏GridView列

Question

我有一個如下所示的gridview ，我想隱藏一個名為FREQ_BAND列，單擊按鈕的第二列名為btnPmtCalculation ，它位於gridview的外側。如何執行此操作？ 我直到此代碼，但無法繼續

<asp:gridview id="gvSpectrum" runat="server" headerstyle-cssclass="HomeGridHeader"
                        allowpaging="True" rowstyle-wrap="false" autogeneratecolumns="False" cssclass="table table-striped table-bordered"
                        cellpadding="4" datakeynames="FEES_CALC_FORMULA,BAND_ID,BAND,FREQ_BAND,SPECTRUM_ID" horizontalalign="Left" showfooter="true"
                        pagesize="10" onpageindexchanging="gvSpectrum_PageIndexChanging" onrowcommand="gvSpectrum_RowCommand">
                          <Columns>
                            <asp:BoundField DataField = "sl_num" HeaderText="SN" />
                            <asp:BoundField DataField = "FREQ_BAND" HeaderText="Frequency Band" />
                            <asp:BoundField DataField = "BW" HeaderText="Bandwidth / Quantity" />
                            <asp:BoundField DataField = "RANGE" HeaderText="Range" />
                          </Columns>
</asp:gridview>
<asp:button id="btnPmtCalculation" runat="server" text="Generate Permenant Sepctrum Invoice" onclick="btnPmtCalculation_Click">

我做的代碼如下所示

 protected void btnPmtCalculation_Click(object sender, EventArgs e)
    {
      bool  pemenant = true;
      int spectrum_id = 0;
      //Button btn = (Button)sender;

      ////Get the row that contains this button
      //GridViewRow gvr = (GridViewRow)btn.NamingContainer;

        foreach (GridViewRow row in gvSpectrum.Rows)
        {
            if (row.RowType == DataControlRowType.Header)
            {
                row.Cells[1].Visible = true;
            }
        }}

Answer 1

您可以嘗試以下方法：

OnRowCreated

protected void OnRowCreated(object sender, GridViewRowEventArgs e)
{
         e.Row.Cells[columnIndex].Visible = false;
}

如果您不喜歡硬編碼的索引，那么我建議的唯一解決方法是為GridViewColumn提供HeaderText，然后使用該HeaderText查找列。

protected void UsersGrid_RowCreated(object sender, GridViewRowEventArgs e)
{
    ((DataControlField)UsersGrid.Columns
            .Cast<DataControlField>()
            .Where(fld => fld.HeaderText == "Email")
            .SingleOrDefault()).Visible = false;
}

OnButtonClick

protected void btnPmtCalculation_Click(object sender, EventArgs e)
{
    gvSpectrum.Columns[Index].Visible = false;
}

Answer 2

簡單，只需單擊按鈕即可隱藏該列。

protected void btnPmtCalculation_Click(object sender, EventArgs e)
{
    gvSpectrum.Columns[i].Visible = false;
}

Answer 3

您可以通過以下方式更改代碼：

protected void btnPmtCalculation_Click(object sender, EventArgs e)
{
          bool  pemenant = true;
          int spectrum_id = 0;
          int columnIndex = 1;
          gvSpectrum.Columns[columnIndex].Visible = false;
}

'columnIndex'列號用於隱藏它

或者，如果您想隱藏列標題文本，請使用以下代碼：

protected void btnPmtCalculation_Click(object sender, EventArgs e)
{
        foreach(DataControlField col in gvSpectrum.Columns)
        {
            if (col.HeaderText == "Email")
                col.Visible = false;

        }
}

Answer 4

嘗試這個：

protected void btnPmtCalculation_Click(object sender, EventArgs e)
{
    gvSpectrum.Columns[columnindex].Visible = false;
    //OR
    gvSpectrum.Columns["columnname"].Visible = false;
}