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我正在通过使用OleDbConnection()
读取Excel值并将值保存在mysql中。如何在DataRow中检查行值是否为空c#asp.net
在Excel文件中,如果某个单元格值为空,则会在添加到数据库时显示错误。
所以我想在分配之前验证每个值。我怎样才能做到这一点?
例如,对于该行:
colBasic = row[10].ToString();
如果此row[10]
为空,则colBasic应为零。
protected void Button1_Click(object sender, EventArgs e)
{
string path = "C:\\Pay.xls";
string query = "SELECT * FROM [Sheet1$]";
OleDbConnection conn = new OleDbConnection();
if (File.Exists(path) == true)
{
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source = '" + path + "'" + @";Extended Properties=""Excel 8.0;HDR=NO;IMEX=1;ImportMixedTypes=Text;TypeGuessRows=0""";
conn.Open();
string ex_id = "";
string colName = "";
string colEmpID = "";
string colBasic = "0";
string colHRA = "0";
string colConveyance = "0";
try
{
OleDbCommand ocmd = new OleDbCommand(query, conn);
OleDbDataReader odr = ocmd.ExecuteReader();
int nFields = odr.FieldCount;
DataTable dtable = new DataTable();
dtable.Load(odr);
if (dtable.Rows.Count > 0)
{
DataRow row = dtable.Rows[0];
if (GlobalCS.OpenConnection() == true)
{
for (int i = 5; i < dtable.Rows.Count; i++)
{
row = dtable.Rows[i];
ex_id = row[0].ToString();
colEmpID = row[2].ToString();
colName = row[1].ToString();
colBasic = row[10].ToString();
colHRA = row[11].ToString();
colConveyance = row[12].ToString();
if (colName != "")
{
sQuery = "insert into salary (EmployeeID,EmployeeName,Basics,DA,HRA,Conveyance,) values(@a,@b,@c,@d,@e,@f)";
cmd = new MySqlCommand(sQuery, GlobalCS.objMyCon);
cmd.Parameters.AddWithValue("a", colEmpID);
cmd.Parameters.AddWithValue("b", colName);
cmd.Parameters.AddWithValue("c", colBasic);
cmd.Parameters.AddWithValue("d", '0');
cmd.Parameters.AddWithValue("e", colHRA);
cmd.Parameters.AddWithValue("f", colConveyance);
rowsaffected = cmd.ExecuteNonQuery();
} //close of if(colName!=0)
} //close of for loop
} // close of if(GlobalCS.Openconnection())
} // close of if(dtable.Rows.Count > 0)
GlobalCS.CloseConnection();
conn.Close();
}
catch (Exception ex)
{
string display = ex.Message;
ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + display + "');", true);
GlobalCS.CloseConnection();
conn.Close();
}
}
else
{
string display = "Payslip.xls file not found";
ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + display + "');", true);
GlobalCS.CloseConnection();
conn.Close();
}
使用[三元操作符(HTTPS更改线路:// MSDN。 microsoft.com/en-us/library/ty67wk28.aspx):'colBasic = row [10]!= null?行[10] .ToString():“0”;' – markpsmith
不......要获取它为空。当我在观察窗口中看到它时,行[10]显示为{}。 – Anu
'colBasic =!string.IsNullOrEmpty(row [10])?行[10] .ToString():“0”;' – markpsmith