如何将变量绑定到Web表单的gridview中 [英] How to bind a variable into a gridview for web forms

问题描述

在我的项目中，我希望变量'v_total'与'gridview3'动态绑定。

以下是我的代码：

In my project I want the variable 'v_total' to bind dynamically with 'gridview3'.
Hereunder is my code:

</Columns>
       <RowStyle HorizontalAlign="Center" />
       <Columns>
       <asp:BoundField DataField="item_code" HeaderText="item_code"  />
</Columns>

protected void Button18_Click（object sender，EventArgs e）

{

v_total = v_total + 1;

}

protected void Button19_Click（object sender，EventArgs e）

{

SqlDataAdapter da1 = new SqlDataAdapter（select item_code from item，con）;

SqlCommandBuilder cb21 = new SqlCommandBuilder（da1）;

DataSet ds1 = new DataSet（member1） ;

da1.Fill（ds1，member1）;

GridView3.DataSource = ds1;

GridView3.DataBind（）;

GridView3.Visible = true;

}

protected void Button18_Click(object sender, EventArgs e)
{
v_total = v_total + 1;
}
protected void Button19_Click(object sender, EventArgs e)
{
SqlDataAdapter da1 = new SqlDataAdapter("select item_code from item", con);
SqlCommandBuilder cb21 = new SqlCommandBuilder(da1);
DataSet ds1 = new DataSet("member1");
da1.Fill(ds1, "member1");
GridView3.DataSource = ds1;
GridView3.DataBind();
GridView3.Visible = true;
}

推荐答案

您好，



代码为上面描述的有点令人困惑。你有两个事件处理程序。第一个使用1增加变量 v_total ，而第二个使用数据库中的SQL查询填充数据集。然后，将该数据集作为数据源绑定到gridview。我缺少的是你想在gridview中使用 v_total 的地方。您只能将一个数据源绑定到gridview，因此您必须将值直接绑定到列或单元格。例如，如果你想将该值绑定到gridview中的特定标签，你可以尝试这样的事情：

Hello,

The code as described above is slightly confusing. You have two event handlers. The first increases the variable v_total with 1, while the second fills a dataset with an SQL query from a database. Then, you bind that dataset as a datasource to the gridview. The bit that I'm missing is where you want to use the v_total in your gridview. You can only bind one datasource to your gridview so you'll have to bind your value directly to a column or cell. If you want to , for example, bind that value to a particular label in your gridview, you could try something like this :

<asp:GridView ID="gridProgress" runat="server" AutoGenerateColumns="False">
    <Columns>
       <asp:TemplateField HeaderText="Total Value">
          <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="10%" />
          <HeaderStyle HorizontalAlign="Center" />
          <ItemTemplate>
              <asp:Label ID="lblTotalValue" runat="server"></asp:Label>
          </ItemTemplate>
      </asp:TemplateField>
    </Columns>
</asp:GridView>

使用Gridview的FindControl属性：

Use the FindControl property of Gridview :

Label lbl = GridView3.Rows[rowIndex].FindControl("lblTotalValue") as Label;
lbl.Text = Convert.ToString(v_total);

当然，您也可以将您的值绑定到gridview中的其他控件。您还可以将值 v_total 添加到数据集（或数据表（也可以作为数据源工作）），然后将其直接绑定到gridview。希望这会有所帮助。

Of course, you could bind your value to other controls inside your gridview as well. You could also add your value v_total to the dataset ( or datatable (works cool as datasource as well)) and then bind it directly to the gridview. Hope this helps.

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