绑定 C#、ASP.net 后在 gridview 中添加新行

add new row in gridview after binding C#, ASP.net

提问by Smile Azeez

I want to add a new blank row to the gridview after binding as seen in the picture when clicking the link button below. The textboxes inside the gridview should remain the same if there is any data entered in it. just want to add one row. please help me. Thanks in advance.

单击下面的链接按钮时，我想在绑定后向 gridview 添加一个新的空白行，如图所示。如果在其中输入了任何数据，则 gridview 内的文本框应保持不变。只想添加一行。请帮我。提前致谢。

采纳答案by epitychia

you can try the following code

你可以试试下面的代码

protected void Button1_Click(object sender, EventArgs e)
   {
       DataTable dt = new DataTable();

       if (dt.Columns.Count == 0)
       {
           dt.Columns.Add("PayScale", typeof(string));
           dt.Columns.Add("IncrementAmt", typeof(string));
           dt.Columns.Add("Period", typeof(string));
       }

       DataRow NewRow = dt.NewRow();
       NewRow[0] = TextBox1.Text;
       NewRow[1] = TextBox2.Text;
       dt.Rows.Add(NewRow); 
       GridView1.DataSource = dt;
       GridViewl.DataBind();
   }

here payscale,incrementamt and period are database field name.

这里 payscale、incrementamt 和 period 是数据库字段名称。

回答by deathismyfriend

try using the cloning technique.

尝试使用克隆技术。

{
    DataGridViewRow row = (DataGridViewRow)yourdatagrid.Rows[0].Clone();
    // then for each of the values use a loop like below.
    int cc = yourdatagrid.Columns.Count;
    for (int i2 = 0; i < cc; i2++)
    {
        row.Cells[i].Value = yourdatagrid.Rows[0].Cells[i].Value;
    }
    yourdatagrid.Rows.Add(row);
    i++;
    }
}

This should work. I'm not sure about how the binding works though. Hopefully it won't prevent this from working.

这应该有效。我不确定绑定是如何工作的。希望它不会阻止它工作。

回答by Pankaj

You can run this example directly.

您可以直接运行此示例。

aspx page:

aspx页面：

<asp:GridView ID="grd" runat="server" DataKeyNames="PayScale" AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Pay Scale">
            <ItemTemplate>
                <asp:TextBox ID="txtPayScale" runat="server" Text='<%# Eval("PayScale") %>'></asp:TextBox>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Increment Amount">
            <ItemTemplate>
                <asp:TextBox ID="txtIncrementAmount" runat="server" Text='<%# Eval("IncrementAmount") %>'></asp:TextBox>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Period">
            <ItemTemplate>
                <asp:TextBox ID="txtPeriod" runat="server" Text='<%# Eval("Period") %>'></asp:TextBox>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<asp:Button ID="btnAddRow" runat="server" OnClick="btnAddRow_Click" Text="Add Row" />

C# code:

C#代码：

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        grd.DataSource = GetTableWithInitialData(); // get first initial data
        grd.DataBind();
    }
}

public DataTable GetTableWithInitialData() // this might be your sp for select
{
    DataTable table = new DataTable();
    table.Columns.Add("PayScale", typeof(string));
    table.Columns.Add("IncrementAmount", typeof(string));
    table.Columns.Add("Period", typeof(string));

    table.Rows.Add(1, "David", "1");
    table.Rows.Add(2, "Sam", "2");
    table.Rows.Add(3, "Christoff", "1.5");
    return table;
}

protected void btnAddRow_Click(object sender, EventArgs e)
{
    DataTable dt = GetTableWithNoData(); // get select column header only records not required
    DataRow dr;

    foreach (GridViewRow gvr in grd.Rows)
    {
        dr = dt.NewRow();

        TextBox txtPayScale = gvr.FindControl("txtPayScale") as TextBox;
        TextBox txtIncrementAmount = gvr.FindControl("txtIncrementAmount") as TextBox;
        TextBox txtPeriod = gvr.FindControl("txtPeriod") as TextBox;

        dr[0] = txtPayScale.Text;
        dr[1] = txtIncrementAmount.Text;
        dr[2] = txtPeriod.Text;

        dt.Rows.Add(dr); // add grid values in to row and add row to the blank table
    }

    dr = dt.NewRow(); // add last empty row
    dt.Rows.Add(dr);

    grd.DataSource = dt; // bind new datatable to grid
    grd.DataBind();
}

public DataTable GetTableWithNoData() // returns only structure if the select columns
{
    DataTable table = new DataTable();
    table.Columns.Add("PayScale", typeof(string));
    table.Columns.Add("IncrementAmount", typeof(string));
    table.Columns.Add("Period", typeof(string));
    return table;
}

回答by Mayank

protected void TableGrid_RowDataBound(object sender, GridViewRowEventArgs e)
{
   if (e.Row.RowIndex == -1 && e.Row.RowType == DataControlRowType.Header)
   {
      GridViewRow gvRow = new GridViewRow(0, 0, DataControlRowType.DataRow,DataControlRowState.Insert);
      for (int i = 0; i < e.Row.Cells.Count; i++)
      {
         TableCell tCell = new TableCell();
         tCell.Text = "&nbsp;";
         gvRow.Cells.Add(tCell);
         Table tbl = e.Row.Parent as Table;
         tbl.Rows.Add(gvRow);
      }
   }
}

回答by Peter Mankge

If you are using dataset to bind in a Grid, you can add the row after you fill in the sql data adapter:

如果你在Grid中使用dataset绑定，你可以在填写sql数据适配器后添加行：

adapter.Fill(ds); ds.Tables(0).Rows.Add();

适配器。填充（ds）；ds.Tables(0).Rows.Add();