[英]In visual studio when i trying to add record to ACCESS file :The field is too small to accept the amount of data you attempted to add.
[英]Error - The field is too small to accept the amount of data you attempted to add. Try inserting or pasting less data
try
{
string CSVFilePathName = textBox4.Text;
for (int i = 0; i < CSVFilePathName.Length; i++)
{
if (CSVFilePathName[i] == '\\')
{
CSVFilePathName.Insert(i + 1, "\\");
}
}
if (string.IsNullOrWhiteSpace(textBox4.Text))
{
MessageBox.Show("Please Select a File");
}
else
{
int count = 0;
// your code here
// string CSVFilePathName = @"'" + textBox4.Text + "'";
string[] Lines = File.ReadAllLines(CSVFilePathName);
string[] Fields;
Fields = Lines[0].Split(new char[] { ',' });
int Cols = Fields.GetLength(0);
DataTable dt = new DataTable();
for (int i = 1; i < Lines.GetLength(0); i++)
{
Fields = Lines[i].Split(new char[] { ',' });
for (int f = 0; f < Cols; f++)
{
q = "SELECT * from questions where main_section='" + Fields[0] + "' AND secondary_section='" + Fields[1] + "' AND tert_section='" + Fields[2] + "' AND question='" + Fields[3] + "' AND difficulty='" + Fields[4] + "'";
OleDbCommand cmdn = new OleDbCommand(q, conn);
//MessageBox.Show(q);
object obj = cmdn.ExecuteScalar();
if (obj == null)
{
q = "insert into questions values('" + Fields[0] + "','" + Fields[1] + "','" + Fields[2] + "','" + Fields[3] + "' ,'" + Fields[4] + "')";
OleDbCommand cmdn1 = new OleDbCommand(q, conn);
cmdn1.ExecuteNonQuery();
}
else
{
count++;
}
//MessageBox.Show(Fields[f]);
}
}
// dataGridClients.DataSource = dt;
string msg = "Upload successful\n";
if (count > 0)
{
msg=count.ToString()+" Questions missed due to their duplicates in the database.";
}
MessageBox.Show(msg);
}
}
catch (Exception ex)
{
MessageBox.Show("Error is " + ex.ToString());
throw;
}
我正在使用c#winform將一個csv文件上傳到我的ms Access數據庫中,但是卻出現錯誤“該字段太小,無法接受您嘗試添加的數據量。嘗試插入或粘貼較少的數據。” 現在該怎么辦?
我建議在SQL中指定表字段,例如
INSERT INTO questions (fieldname1, fieldname2, ...) VALUES (...)
使用參數化值,而不要直接在字符串中寫入值。 這也允許您指定數據類型,然后ADO.Net OLE適配器將希望適當地處理它,並毫無問題地插入長文本。 請轉至讀取/寫入BLOB ...以獲取插入BLOBS的示例。 概念和代碼示例與插入Long Text值非常相關。 它演示了如何為查詢設置參數。 對於您的情況,對於長文本字段,請使用OleDbType.LongVarWChar
。
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