出口的GridView到Excel＃2 [英] export GridView to excel #2
问题描述
我的GridView绑定到一个SqlDataSource，然后_rowcreated事件做一些验证，当行不符合要求我使用隐藏它e.Row.Visible = FALSE;
这工作正常，并只在GridView显示正确的行。现在我有一个按钮，导出到Excel以及与出口也隐藏的行之外的伟大工程。我不想导出的隐藏的行。
有没有一种方法，我可以告诉GridView控件不添加该行，而不是隐藏它？
有一个简单的方法来删除所有隐藏的行我运行导出之前？
我不能出口过程中添加隐藏的行？正如你可以在code见下面我试着做这一个，但它不承认该行是否可见或不可见。
导出code：
公共静态无效的出口（字符串文件名，GridView的GV）
{
HttpContext.Current.Response.Clear（）;
HttpContext.Current.Response.AddHeader（
内容处置的String.Format（附件;文件名= {0}，文件名））;
HttpContext.Current.Response.ContentType =应用程序/ MS-Excel的; 使用（StringWriter的SW =新的StringWriter（））
{
使用（HTW的HtmlTextWriter =新的HtmlTextWriter（SW））
{
//创建一个表单包含网格
表的表=新表（）; gv.GridLines = GridLines.Both;
table.GridLines = gv.GridLines;
//table.BackColor = Color.Yellow; //标题行添加到表
如果（gv.HeaderRow！= NULL）
{
GridViewExportUtil prepareControlForExport（gv.HeaderRow）。
table.Rows.Add（gv.HeaderRow）; //颜色头
table.Rows [0] .BackColor = gv.HeaderStyle.BackColor;
table.Rows [0] .ForeColor = gv.HeaderStyle.ForeColor;
} //每个数据行添加到表
的foreach（在gv.Rows GridViewRow行）
{ 如果（row.Visible ==真）
{
GridViewExportUtil prepareControlForExport（行）。
table.Rows.Add（行）;
}
} //颜色的行
布尔altColor = FALSE;
的for（int i = 1; I＆LT; table.Rows.Count;我++）
{
如果（！altColor）
{
table.Rows [I] .BackColor = gv.RowStyle.BackColor;
altColor = TRUE;
}
其他
{
table.Rows [I] .BackColor = gv.AlternatingRowStyle.BackColor;
altColor = FALSE;
}
} //渲染表到的HTMLWriter
table.RenderControl（HTW）; //渲染的HTMLWriter到响应
HttpContext.Current.Response.Write（sw.ToString（））;
HttpContext.Current.Response.End（）;
}
}
}
在第一个地方，为什么你已经从你的GridView隐藏的行？只有得到你想要的数据。而使用这种方法导出;
无效ExportToExcel（GridView控件grdData，字符串文件名）
{
grdData.BorderStyle = BorderStyle.Solid;
grdData.BorderWidth = 1;
grdData.BackColor = Color.WhiteSmoke;
grdData.GridLines = GridLines.Both;
grdData.Font.Name =宋体;
grdData.Font.Size = FontUnit.XXSmall;
grdData.HeaderStyle.BackColor = Color.DimGray;
grdData.HeaderStyle.ForeColor = Color.White;
grdData.RowStyle.HorizontalAlign = HorizontalAlign.Left;
grdData.RowStyle.VerticalAlign = VerticalAlign.Top; HTT presponse响应= HttpContext.Current.Response;
response.Clear（）;
Response.Charset的=;
response.ContentType =应用程序/ vnd.ms-EXCEL;
response.AddHeader（内容处置，附件;文件名= \\+文件名+\\）; 使用（VAR SW =新的StringWriter（））
{
使用（VAR HTW =新的HtmlTextWriter（SW））
{
grdData.RenderControl（HTW）;
RESPONSE.WRITE（sw.ToString（））;
到Response.End（）;
}
}
}
I am binding a GridView to a sqldatasource and then on _rowcreated event doing some validations and when the row does not meet requirements I am hiding it using e.Row.Visible = false;
This works fine and only displays the correct rows in the gridview. Now I have a button to export to excel and that works great with the exception of exporting also the hidden rows. I do not want the hidden rows exported.
Is there a way that i can tell the gridview to not add that row instead of hiding it? Is there a simple method to delete all hidden rows before i run the export? Can i not add the hidden rows during the export? As you can see in the code below I tried to do this one, but it does not recognize whether the row is visible or not.
Export Code:
public static void Export(string fileName, GridView gv)
{
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader(
"content-disposition", string.Format("attachment; filename={0}", fileName));
HttpContext.Current.Response.ContentType = "application/ms-excel";
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// Create a form to contain the grid
Table table = new Table();
gv.GridLines = GridLines.Both;
table.GridLines = gv.GridLines;
//table.BackColor = Color.Yellow;
// add the header row to the table
if (gv.HeaderRow != null)
{
GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
table.Rows.Add(gv.HeaderRow);
//color the header
table.Rows[0].BackColor = gv.HeaderStyle.BackColor;
table.Rows[0].ForeColor = gv.HeaderStyle.ForeColor;
}
// add each of the data rows to the table
foreach (GridViewRow row in gv.Rows)
{
if (row.Visible == true)
{
GridViewExportUtil.PrepareControlForExport(row);
table.Rows.Add(row);
}
}
// color the rows
bool altColor = false;
for (int i = 1; i < table.Rows.Count; i++)
{
if (!altColor)
{
table.Rows[i].BackColor = gv.RowStyle.BackColor;
altColor = true;
}
else
{
table.Rows[i].BackColor = gv.AlternatingRowStyle.BackColor;
altColor = false;
}
}
// render the table into the htmlwriter
table.RenderControl(htw);
// render the htmlwriter into the response
HttpContext.Current.Response.Write(sw.ToString());
HttpContext.Current.Response.End();
}
}
}
In the first place why you have hidden rows from your gridview? Only get data that you wanted. And use this method to export;
void ExportToExcel(GridView grdData, string filename)
{
grdData.BorderStyle = BorderStyle.Solid;
grdData.BorderWidth = 1;
grdData.BackColor = Color.WhiteSmoke;
grdData.GridLines = GridLines.Both;
grdData.Font.Name = "Verdana";
grdData.Font.Size = FontUnit.XXSmall;
grdData.HeaderStyle.BackColor = Color.DimGray;
grdData.HeaderStyle.ForeColor = Color.White;
grdData.RowStyle.HorizontalAlign = HorizontalAlign.Left;
grdData.RowStyle.VerticalAlign = VerticalAlign.Top;
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.Charset = "";
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=\"" + filename+ "\"");
using (var sw = new StringWriter())
{
using (var htw = new HtmlTextWriter(sw))
{
grdData.RenderControl(htw);
response.Write(sw.ToString());
response.End();
}
}
}
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