求帮助，这个怎么老是出现未将对象引用设置到对象的实例，但是不报错啊。。。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace 仓库管理系统
{
public partial class 订单表添加 : Form
{
private SqlDataAdapter objsqldataadapter;
private SqlConnection objsqlconn;
private DataSet objdataset;
private SqlParameter objsqlparameter;
public 订单表添加()
{
InitializeComponent();
}
private bool ValidateFields()
{
bool returnValue = true;
if (textBox1.Text == "")
{
MessageBox.Show("编号不能为空，请输入", "提示");
textBox1.Focus();
return false;
}
else
{
for (int i = 0; i < this.textBox1.Text.Length; i++)
{
if (!char.IsNumber(textBox1.Text.ToString(), i))
{
MessageBox.Show("编号为数字谢谢！！！！！", "提示");
this.textBox1.Focus();
return false;
}
}
for (int i = 0; i < this.textBox2.Text.Length; i++)
{
if (!char.IsNumber(textBox2.Text.ToString(), i))
{
MessageBox.Show("货物代号应为数字！", "提示");
this.textBox2.Focus();
return false;
}
}
for (int i = 0; i < this.textBox6.Text.Length; i++)
{
if (!char.IsNumber(textBox6.Text.ToString(), i))
{
MessageBox.Show("进货时间应为数字！", "提示");
this.textBox6.Focus();
return false;
}
}
for (int i = 0; i < this.textBox8.Text.Length; i++)
{
if (!char.IsNumber(textBox8.Text.ToString(), i))
{
MessageBox.Show("价格应为数字！", "提示");
this.textBox8.Focus();
return false;
}
}
for (int i = 0; i < this.textBox3.Text.Length; i++)
{
if (char.IsNumber(textBox3.Text.ToString(), i))
{
MessageBox.Show("付款与否应为汉子！", "提示");
this.textBox3.Focus();
return false;
}
}
for (int i = 0; i < this.textBox4.Text.Length; i++)
{
if (!char.IsNumber(textBox4.Text.ToString(), i))
{
MessageBox.Show("数量应为数字！", "提示");
this.textBox4.Focus();
return false;
}
}
for (int i = 0; i < this.textBox5.Text.Length; i++)
{
if (!Char.IsNumber(textBox5.Text.ToString(), i))
{
MessageBox.Show("进货人应为数字！", "提示");
this.textBox5.Focus();
return false;
}
}
for (int i = 0; i < this.textBox7.Text.Length; i++)
{
if (!char.IsNumber(textBox7.Text.ToString(), i))
{
MessageBox.Show("入库时间应为数字！", "提示");
this.textBox7.Focus();
return false;
}
}
return returnValue;
}
}
private void 订单表添加_Load(object sender, EventArgs e)
{
objsqlconn = new SqlConnection("Data Source=DESKTOP-EVHJF9I;Initial Catalog=仓库管理系统;Integrated Security=True");
objsqlconn.Open();
objsqldataadapter = new SqlDataAdapter();
objsqldataadapter.SelectCommand = new SqlCommand("select*from订货信息表", objsqlconn);
objdataset = new DataSet();
objsqldataadapter.Fill(objdataset, "订货单表");
string insCmd = "insert into 订货单表 values(@编号,@货物代号,@进货时间,@价格,@付款与否,@数量,@进货人,@入库)";
this .objsqldataadapter.InsertCommand = new SqlCommand (insCmd ,this.objsqlconn);
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@货物代号", System.Data.SqlDbType.Int));
objsqlparameter.SourceColumn = "货物代号";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@编号", System.Data.SqlDbType.Int));
objsqlparameter.SourceColumn = "编号";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@入库时间", System.Data.SqlDbType.Char,50));
objsqlparameter.SourceColumn = "入库时间";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@进货时间", System.Data.SqlDbType.Char,20));
objsqlparameter.SourceColumn = "进货时间";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@数量", System.Data.SqlDbType.Char, 50));
objsqlparameter.SourceColumn = "数量";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@进货人", System.Data.SqlDbType.Char,20));
objsqlparameter.SourceColumn = "进货人";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@付款与否", System.Data.SqlDbType.Char,20));
objsqlparameter.SourceColumn = "付款与否";
objsqlparameter.SourceVersion = DataRowVersion.Current;
objsqlparameter = objsqldataadapter.InsertCommand.Parameters.Add(new SqlParameter("@价格", System.Data.SqlDbType.Char, 10));
objsqlparameter.SourceColumn = "价格";
objsqlparameter.SourceVersion = DataRowVersion.Current;
}
private void button1_Click(object sender, EventArgs e)
{
try
{
if (this.textBox1.Text != string.Empty && this.textBox2.Text != string.Empty && this.textBox6.Text != string.Empty && this.textBox4.Text != string.Empty && this.textBox5.Text != string.Empty && this.textBox3.Text != string.Empty && this.textBox8.Text != string.Empty && this.textBox7.Text != string.Empty)
{
if (ValidateFields ())
{
DataRow row =objdataset.Tables["订货信息表"].NewRow();
row["编号"] = this.textBox1.Text;
row["货物代号"] = this.textBox2.Text;
row["入库时间"] = this.textBox7.Text;
row["价格"] = this.textBox8.Text;
row["付款与否"] = this.textBox3.Text;
row["数量"] = this.textBox4.Text;
row["进货人"] = this.textBox5.Text;
row["进货时间"] = this.textBox6.Text;
objdataset.Tables["订货信息表"].Rows.Add(row);
objdataset.HasChanges(DataRowState .Added);
objsqldataadapter.Update(objdataset,"订货信息表");
MessageBox.Show("添加成功","提示");
this.textBox1.Clear();
this.textBox2.Clear();
this.textBox3.Clear();
this.textBox8.Clear();
this.textBox5.Clear();
this.textBox6.Clear();
this.textBox7.Clear();
this.textBox4.Clear();
this.textBox1.Focus();
}
}
else
MessageBox.Show ("提供完整信息！");
}
catch (SqlException ex)
{
MessageBox.Show(ex.Message.ToString());
}
catch (Exception genEX)
{
MessageBox.Show(genEX.Message.ToString());
}
}
private void button2_Click(object sender, EventArgs e)
{
this.Close();
}
}
}