I am populating a table with the values in excel using sql bulk copy in c#.
DataTable dt = new DataTable();
string line = null;
int i = 0;
using (StreamReader sr = File.OpenText(@"c:\temp\table1.csv"))
{
while ((line = sr.ReadLine()) != null)
{
string[] data = line.Split(',');
if (data.Length > 0)
{
if (i == 0)
{
foreach (var item in data)
{
dt.Columns.Add(new DataColumn());
}
i++;
}
DataRow row = dt.NewRow();
row.ItemArray = data;
dt.Rows.Add(row);
}
}
}
using (SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConsoleApplication3.Properties.Settings.daasConnectionString"].ConnectionString))
{
cn.Open();
using (SqlBulkCopy copy = new SqlBulkCopy(cn))
{
copy.ColumnMappings.Add(0, 0);
copy.ColumnMappings.Add(1, 1);
copy.ColumnMappings.Add(2, 2);
copy.ColumnMappings.Add(3, 3);
copy.ColumnMappings.Add(4, 4);
copy.DestinationTableName = "Censis";
copy.WriteToServer(dt);
}
}
In the above code, I am inserting the records from excel into the table. But, I have one more column "ProcessID" in the Censis table. For each time run, I need to generate a GUID and populate this column with this.
Can any one help me how to populate the ProcessID column when I do bulk copy as above with a generated GUID for all the rows for that run?
当您插入数据库时,使用函数newsequentialid
Thanks JonH. But, I found an answer for my problem. I can use something like this. I can add a new DataColumn with a default value to the datatable which I use for bulk copy.
DataTable dt = new DataTable();
string line = null;
int i = 0;
using (StreamReader sr = File.OpenText(@"c:\temp\table1.csv"))
{
while ((line = sr.ReadLine()) != null)
{
string[] data = line.Split(',');
if (data.Length > 0)
{
if (i == 0)
{
foreach (var item in data)
{
dt.Columns.Add(new DataColumn());
}
i++;
}
DataRow row = dt.NewRow();
row.ItemArray = data;
dt.Rows.Add(row);
}
}
DataColumn col = new DataColumn("BatchId", typeof(System.Guid));
col.DefaultValue = Guid.NewGuid();
dt.Columns.Add(col);
}
using (SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConsoleApplication3.Properties.Settings.daasConnectionString"].ConnectionString))
{
cn.Open();
using (SqlBulkCopy copy = new SqlBulkCopy(cn))
{
copy.ColumnMappings.Add(0, 0);
copy.ColumnMappings.Add(1, 1);
copy.ColumnMappings.Add(2, 2);
copy.ColumnMappings.Add(3, 3);
copy.ColumnMappings.Add(4, 4);
copy.DestinationTableName = "Censis";
copy.WriteToServer(dt);
}
}
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