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分享CS0161: “UpdatingDBDirectly.GetSelectedRecord()”: 并非所有的代码路径都返回值
下面是问题所在相关代码,请各位大侠帮分析分析!
protected void btnEdit_Click( object sender, EventArgs e)
{
int shipperID = GetSelectedRecord();
string cmd = @"Update Shippers set CompanyName = '" +
this.txtName.Text +
"', Phone ='" + this.txtPhone.Text + "' where ShipperID = " + shipperID;
UpdateDB(cmd);
PopulateGrid();
}
protected int GetSelectedRecord()
{
int shipperID = -1;
int index = GridView1.SelectedIndex;
if (index != -1)
{
DataKey key = GridView1.DataKeys[index];
shipperID = (int)key.Value;
return shipperID;
}
}
protected void btnDelete_Click(object sender, EventArgs e)
{
string cmd = @"delete from Shippers where ShipperID =" + GetSelectedRecord();
UpdateDB(cmd);
PopulateGrid();
}
protected void btnEdit_Click( object sender, EventArgs e)
{
int shipperID = GetSelectedRecord();
string cmd = @"Update Shippers set CompanyName = '" +
this.txtName.Text +
"', Phone ='" + this.txtPhone.Text + "' where ShipperID = " + shipperID;
UpdateDB(cmd);
PopulateGrid();
}
protected int GetSelectedRecord()
{
int shipperID = -1;
int index = GridView1.SelectedIndex;
if (index != -1)
{
DataKey key = GridView1.DataKeys[index];
shipperID = (int)key.Value;
return shipperID;
}
}
protected void btnDelete_Click(object sender, EventArgs e)
{
string cmd = @"delete from Shippers where ShipperID =" + GetSelectedRecord();
UpdateDB(cmd);
PopulateGrid();
}
...全文
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sir0721 2008-02-27
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问题确实如此,谢谢二位!
Soloboy1020 2008-02-27
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GetSelectedRecord() 函数里面那个if判断如果是假的话就没返回值了 ,所以报错
可以参考1楼的代码改一下
可以参考1楼的代码改一下
userwjg 2008-02-27
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protected int GetSelectedRecord()
{
int shipperID = -1;
int index = GridView1.SelectedIndex;
if (index != -1)
{
DataKey key = GridView1.DataKeys[index];
shipperID = (int)key.Value;
}
return shipperID;
}
改这样
{
int shipperID = -1;
int index = GridView1.SelectedIndex;
if (index != -1)
{
DataKey key = GridView1.DataKeys[index];
shipperID = (int)key.Value;
}
return shipperID;
}
改这样
