Question

I am developing Windows application (environment: Visual Studio 2010 and C#) I use a datagridview with records completed by datatable dt:

 dataGridView1.DataSource = dt;

This datatable has 20 columns with 1 identity column - column[0] = autonumber, and column[1] called “RecordChecked” implemented as Boolean (checkbox).

I need to solve next problems:

Select rows filtered by column[2] (in code example: DrawingNo='DM-3012');
Keep these records
Add exactly the same records below existing but update column[2] with different value like DrawingNo='DM-3013' (so we’ll have twice more records)

I started from copying records from one datatable into another (see code below) – this code works ok, but then stacked how to add copied records below existing and then update them:

DataTable dtSource = ((DataTable)dataGridView1.DataSource);

DataTable dtTarget = new DataTable();

dtTarget = ((DataTable)dataGridView1.DataSource).Clone();

DataRow[] rowsToCopy;

rowsToCopy = ((DataTable)dataGridView1.DataSource).Select("DrawingNo='DM-3012'");

foreach (DataRow temp in rowsToCopy)
{
      dtTarget.ImportRow(temp);
}

dt = dtTarget;

Thanks,

Answer 1

我想我找到了解决这个问题的好方法。 1.创建存储过程（mySP）。

此SP创建临时表，我们在其中找到所有使用子句＆＃39; WHERE DrawingNo = @ CopyFrom＆＃39;选择的记录。
然后这个SP用如下语句更新临时表：
UPDATE＃TempTbl1 SET RecChecked = 0，DrawingNo = @CopyTo WHERE DrawingNo = @CopyFrom。然后，SP将临时表中的更新记录插入主表最后，SP删除临时表并从主表中选择所有需要的记录。 2.现在我们可以在应用程序中运行此SP并将数据绑定到datagridview，如：

//Run SP
using (SqlCommand cmd = new SqlCommand("mySP", con))
{
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add("@CopyFrom", SqlDbType.VarChar).Value =   sValueFrom;       
    cmd.Parameters.Add("@CopyTo", SqlDbType.VarChar).Value = sValueTo;           
    con.Open();
    cmd.ExecuteNonQuery();
}

//Create SELECT statement
string strSelect = "SELECT Recid, RecChecked, DrawingNo, ...  FROM Tbl1 WHERE DrawingNo = '" + sValueTo + "'"

//fill dataadapter
sda = new SqlDataAdapter(@strSelect, con);
dt = new DataTable();
sda.Fill(dt);

有效！

DataGridView Datatable Copy-Keep-Add-Update rows

1 个答案: