我有以下情况。我有两种用数据填充 GridView 的方法。这些如下：
protected void btSearch_Click(object sender, EventArgs e)
{
lqPackWeights.WhereParameters.Clear();
ControlParameter cp = new ControlParameter();
cp.Type = TypeCode.String;
if (radBuyer.Checked)
{
cp.ControlID = "ddlProd";
cp.PropertyName = "SelectedValue";
lbRadMiss.Text = "";
}
else if (radProd.Checked)
{
cp.ControlID = "tbxProdAC";
cp.PropertyName = "Text";
lbRadMiss.Text = "";
}
else
{
cp.ControlID = "lbRadMiss";
cp.PropertyName = "Text";
lbRadMiss.Text = "Please check appropriate radio button before you attempt a search";
}
cp.Name = "IDDesc";
lqPackWeights.WhereParameters.Add(cp);
GridView1.DataSourceID = "lqPackWeights";
GridView1.DataBind();
}
和
protected void btnShowPaper_Click(object sender, EventArgs e)
{
ORWeightsDataClassesDataContext dbPa = new ORWeightsDataClassesDataContext();
int max = 0;
if (int.TryParse(txtbxHowMany.Text, out max))
{
var queryPa = dbPa.tblOnlineReportingCOMPLETEWeights
.Where(x => x.MaterialLevel == "Primary" && x.MaterialText == "Paper" && x.MemberId == "FM00012")
.OrderByDescending(x => x.ProductPercentage).Take(max);
GridView1.DataSource = queryPa;
GridView1.DataBind();
这些都可以很好地使用其适当的数据集填充网格视图。
我还有以下代码将 gridview 内容导出到 csv：
protected void btnExportCSV_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.csv");
Response.Charset = "";
Response.ContentType = "application/text";
GridView1.AllowPaging = false;
GridView1.DataBind();
StringBuilder sb = new StringBuilder();
for (int k = 0; k < GridView1.Columns.Count; k++)
{
sb.Append(GridView1.Columns[k].HeaderText + ',');
}
sb.Append("\r\n");
for (int i = 0; i < GridView1.Rows.Count; i++)
{
for (int k = 0; k < GridView1.Columns.Count; k++)
{
sb.Append(GridView1.Rows[i].Cells[k].Text + ',');
}
sb.Append("\r\n");
}
Response.Output.Write(sb.ToString());
Response.Flush();
Response.End();
}
导出到 csv 在第一种情况（即 if/else if 场景）中运行良好，但在第二种情况下，仅提取标题。
那这里是怎么回事？！我添加了一些中断，看起来正在执行导出到 csv 代码，但是实际的 GridView 内容没有放在同一个 csv 文件中。
有任何想法吗？