How Do I Insert Null Values In Db Table From Excel With Bulk Insert In C#

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C#3.5

Hello,

if excel sheet having empty column, then how can i insert null value in database for the empty column in excel.

Posted 22-Apr-14 23:47pm

Member 10454499

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Honey Jagyasi 23-Apr-14 6:35am

In query u can handle null with blank. IsNull("ColumnName",'')

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nandakishoreroyal · Answer 1 · 2014-04-23T00:10:00

Solution 1

while creating columns in table , you add coulumnName Datatype = NULL

for ex:

empname varchar(200)=NULL

Posted 23-Apr-14 0:10am

nandakishoreroyal

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Member 10454499 23-Apr-14 6:21am

am allowing null values in db table, even though it is showing error sir

Honey Jagyasi 23-Apr-14 6:23am

if the column value expects int then it would give u error. for varchar it will accept null.

Member 10454499 23-Apr-14 6:39am

all string columns only their in db table sir

nandakishoreroyal 23-Apr-14 6:36am

Dear Honey Jagyasi,

i just gave an example varchar , in same way for integer also,

Ex: empid int=NULL

nandakishoreroyal · Answer 2 · 2014-04-23T00:43:00

Solution 2

Please post the code what you have tried..

Posted 23-Apr-14 0:43am

nandakishoreroyal

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Member 10454499 23-Apr-14 6:45am

Utility ut = new Utility();

string xls = ut.UploadData(Constants.UploadData, fleData);

string absPath = Server.MapPath("~/Uploads/" + xls);
string connectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;";
connectionString += "Data Source=";
connectionString += absPath + ";";
connectionString += @"Extended Properties=""Excel 12.0;HDR=YES;IMEX=1""";

using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string sheetname = dt.Rows[0]["Table_Name"].ToString();
string query = "SELECT * FROM [" + sheetname + "]";
OleDbCommand ocmd = new OleDbCommand(query, conn);
OleDbDataReader rdr = ocmd.ExecuteReader();

//*******************************************************
string conString = Constants.CONNECTION;
using (SqlConnection con = new SqlConnection(conString))
{
con.Open();
while (rdr.Read())
{
string name = Convert.ToString(rdr[1]);
string organization = Convert.ToString(rdr[2]);
string intrestedIn = Convert.ToString(rdr[3]);
string phone = Convert.ToString(rdr[4]);
string email = Convert.ToString(rdr[5]);
string address = Convert.ToString(rdr[6]);
string city = Convert.ToString(rdr[7]);
string comments = Convert.ToString(rdr[8]);
DateTime dateofEntry = Convert.ToDateTime(rdr[9]);

using (SqlCommand cmd = new SqlCommand("insert into tblTempData values(@Name,@Organization,@IntrestedIn,@Phone,@Email,@Address,@City,@Comments,@DateOfEntry)", con))
{
cmd.Parameters.AddWithValue("@Name", SqlDbType.VarChar).Value = name;
cmd.Parameters.AddWithValue("@Organization", SqlDbType.VarChar).Value = organization;
cmd.Parameters.AddWithValue("@IntrestedIn", SqlDbType.VarChar).Value = intrestedIn;
cmd.Parameters.AddWithValue("@Phone", SqlDbType.VarChar).Value = phone;
cmd.Parameters.AddWithValue("@Email", SqlDbType.VarChar).Value = email;
cmd.Parameters.AddWithValue("@Address", SqlDbType.VarChar).Value = address;
cmd.Parameters.AddWithValue("@City", SqlDbType.VarChar).Value = city;
cmd.Parameters.AddWithValue("@Comments", SqlDbType.VarChar).Value = comments;
cmd.Parameters.AddWithValue("@DateOfEntry", SqlDbType.DateTime).Value = dateofEntry;

cmd.ExecuteNonQuery();
}
}

}
}

Honey Jagyasi 23-Apr-14 6:58am

cmd.Parameters.Add(new SqlParameter("@Name", DBNull.Value));

Member 10454499 23-Apr-14 7:08am

No sir, it is not working

CHill60 23-Apr-14 8:00am

Please use the Have Question or Comment links rather than posting remarks as "solutions"

nandakishoreroyal · Answer 3 · 2014-04-23T01:26:00

try like that,

C#

#region"BULK UPLOAD DATA TO DB TABLE                  "
      private static void BulkUploadDataToDBTable(DataTable dtData, int FileID)
      {
          string strSource = "DumpDataFromSourceFiles";
          try
          {
              if (dtData != null && dtData.Rows.Count > 0)
              {
                  myLogFile.LogMessage((int)AppLog.LogLevel.DEBUG, strSource, "Started bulkuploading the records in datatable to PhoneRSVP table");
                  string sqlConnectionString = Constants.DBConn;
                  SqlConnection sqlConnection = new SqlConnection(sqlConnectionString);
                  sqlConnection.Open();

                  //Adding the PhoneRSVPFileID column to the datatable
                  DataColumn dcFileID = new DataColumn();
                  dcFileID.DataType = typeof(int);
                  dcFileID.DefaultValue = FileID;
                  dcFileID.ColumnName = "PhoneRSVPFileID";
                  dtData.Columns.Add(dcFileID);

                  //Adding the CreatedOn column to the datatable
                  DataColumn dcCreatedOn = new DataColumn();
                  dcCreatedOn.DataType = typeof(DateTime);
                  dcCreatedOn.DefaultValue = DateTime.Now;
                  dcCreatedOn.ColumnName = "CreatedOn";
                  dtData.Columns.Add(dcCreatedOn);


                  //to clear existing data from table
                  SqlCommand cmd = new SqlCommand("Delete from PhoneRSVP", sqlConnection);
                  cmd.ExecuteNonQuery();

                  using (SqlBulkCopy bcp = new SqlBulkCopy(sqlConnectionString, SqlBulkCopyOptions.FireTriggers))
                  {
                      bcp.ColumnMappings.Add("CUST_SKEY", "CUST_SKEY");
                      bcp.ColumnMappings.Add("APPNUM_SKEY", "APPNUM_SKEY");
                      bcp.ColumnMappings.Add("INVITEE_FIRST_NAME", "INVITEE_FIRST_NAME");
                      bcp.ColumnMappings.Add("INVITEE_LAST_NAME", "INVITEE_LAST_NAME");
                      bcp.ColumnMappings.Add("STORE_NUMBER", "STORE_NUMBER");
                      bcp.ColumnMappings.Add("EVENT_DATE", "EVENT_DATE");
                      bcp.ColumnMappings.Add("EVENT_TIME", "EVENT_TIME");
                      bcp.ColumnMappings.Add("GUESTS", "GUESTS");
                      bcp.ColumnMappings.Add("RSVP_DATETIME_RESPONSE", "RSVP_DATETIME_RESPONSE");
                      bcp.ColumnMappings.Add("VRU_CSR", "VRU_CSR");
                      bcp.ColumnMappings.Add("EVENT_CODE", "EVENT_CODE");
                      bcp.ColumnMappings.Add("PhoneRSVPFileID", "PhoneRSVPFileID");
                      bcp.ColumnMappings.Add("CreatedOn", "CreatedOn");


                      bcp.DestinationTableName = "PhoneRSVP";

                      bcp.BulkCopyTimeout = 0;
                      bcp.BatchSize = 1000;

                      bcp.WriteToServer(dtData);
                  }
                  myLogFile.LogMessage((int)AppLog.LogLevel.DEBUG, strSource, "Records in datatable bulkuploaded into PhoneRSVP table successfully.");
                  sqlConnection.Close();
              }
          }
          catch (Exception ex)
          {
              //MoveToArchive(filePath, false);
              myLogFile.LogMessage((int)AppLog.LogLevel.ERROR, strSource, ex.Message);
              errfunName = strSource;
              throw ex;
          }
      }
      #endregion

How Do I Insert Null Values In Db Table From Excel With Bulk Insert In C#

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