在我有关于如何（从 ASP.NET 网格视图动态添加和删除行）的问题之前，我通过使用文章（http://www.codeproject.com/Articles/467788/Dynamically-adding-and-deleting -来自 ASP-NET 的行）。在本文中，当我们按类型（手工）完成字段时，我们会添加行。现在我喜欢在从下拉列表中选择值后完成行的一些字段，所以我使用了
public static List<string> Docprpp = new List<string>(3);
对于添加第一行我没有问题，当我从下拉列表中选择文档时，我可以在字段中使用（文档编号，rev，title），对于其他字段，我可以手动填写。
dtCurrentTable.Rows[i - 1]["Col1"] = Docprpp[0];
dtCurrentTable.Rows[i - 1]["Col2"] = Docprpp[1];
dtCurrentTable.Rows[i - 1]["Col3"] = Docprpp[2];
dtCurrentTable.Rows[i - 1]["Col4"] = TextBoxsh.Text;
dtCurrentTable.Rows[i - 1]["Col5"] = DrpStatus.SelectedValue;
dtCurrentTable.Rows[i - 1]["Col6"] = DrpClass.SelectedValue;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
grvdocumentDetails.DataSource = dtCurrentTable;
grvdocumentDetails.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
Docprpp.Clear();
SetPreviousData();
}
但是我喜欢添加第二行或更多行并使用下拉列表中的不同值，但它可以根据图片处理所有行（旧的、新的）相同的（文档编号、版本、标题）。
(public static List<string> Docprpp = new List<string>(3);)
请帮助我如何使用这个变量并解决我的问题。
protected void ddlProjectDocument_SelectedIndexChanged(object sender, EventArgs e)
{
using (_DataContext = new EDMSDataContext())
{
int x = Convert.ToInt32(ddlProjectDocument.SelectedValue);
var subject = from y in _DataContext.tblDocuments
where y.DocId == x
select y.TITLE;
var docno = from z in _DataContext.tblDocuments
where z.DocId == x
select z.DocumentNo;
Docprpp.Add(docno.SingleOrDefault().ToString());
var MaxRev = _DataContext.tblTransmittalls.Where(rev => rev.DocID == x).Max(rev => rev.REV);
int newRev = (MaxRev == null) ? 0 : Convert.ToInt32(MaxRev) + 1;
Docprpp.Add(newRev.ToString());
var MaxReview = _DataContext.Project_Documents.Where(rev => rev.DocId == x && rev.Rev == Convert.ToInt32(MaxRev)).Max(rev => rev.Review);
int newReview = (MaxReview == null) ? newReview = 1 : Convert.ToInt32(MaxReview) + 1;
Docprpp.Add(subject.SingleOrDefault().ToString());
}
}
private void AddNewRow()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
TextBox TextBoxsh = (TextBox)grvdocumentDetails.Rows[rowIndex].Cells[4].FindControl("txtsh");
DropDownList DrpStatus = (DropDownList)grvdocumentDetails.Rows[rowIndex].Cells[5].FindControl("drpStatus");
DropDownList DrpClass = (DropDownList)grvdocumentDetails.Rows[rowIndex].Cells[6].FindControl("drpClass");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = i + 1;
dtCurrentTable.Rows[i - 1]["Col1"] = Docprpp[0];
dtCurrentTable.Rows[i - 1]["Col2"] = Docprpp[1];
dtCurrentTable.Rows[i - 1]["Col3"] = Docprpp[2];
dtCurrentTable.Rows[i - 1]["Col4"] = TextBoxsh.Text;
dtCurrentTable.Rows[i - 1]["Col5"] = DrpStatus.SelectedValue;
dtCurrentTable.Rows[i - 1]["Col6"] = DrpClass.SelectedValue;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
grvdocumentDetails.DataSource = dtCurrentTable;
grvdocumentDetails.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
Docprpp.Clear();
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
Label TextBoxDoc = (Label)grvdocumentDetails.Rows[rowIndex].Cells[1].FindControl("txtDoc");
Label TextBoxRev = (Label)grvdocumentDetails.Rows[rowIndex].Cells[2].FindControl("txtRev");
Label TextBoxtitle = (Label)grvdocumentDetails.Rows[rowIndex].Cells[3].FindControl("txttitle");
TextBox TextBoxsh = (TextBox)grvdocumentDetails.Rows[rowIndex].Cells[4].FindControl("txtsh");
DropDownList DrpStatus = (DropDownList)grvdocumentDetails.Rows[rowIndex].Cells[5].FindControl("drpStatus");
DropDownList DrpClass = (DropDownList)grvdocumentDetails.Rows[rowIndex].Cells[6].FindControl("drpClass");
// drCurrentRow["RowNumber"] = i + 1;
grvdocumentDetails.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
TextBoxDoc.Text = dt.Rows[i]["Col1"].ToString();
TextBoxRev.Text = dt.Rows[i]["Col2"].ToString();
TextBoxtitle.Text = dt.Rows[i]["Col3"].ToString();
TextBoxsh.Text = dt.Rows[i]["Col4"].ToString();
DrpStatus.SelectedValue = dt.Rows[i]["Col5"].ToString();
DrpClass.SelectedValue = dt.Rows[i]["Col6"].ToString();
rowIndex++;
}
}
}
}